Evo Upgrades

[Mark Traylor]

Has anyone received an upgrade kit yet?  I put in my order a while ago and have not heard anything back yet regarding payment.   Our series is supposed to start racing on Evo soon.

[Eric Kinn]

Got a call from MaxSpeed late yesterday asking for payment information. I had ordered both a junior and senior upgrade and they were already out of the senior. They are shipping the junior today but the senior probably won’t ship for another 2 or 3 weeks. Know of others in our club that also got called and were able to get their senior upgrade.

[Brett Clatt]

Good to know. I sent my info to them for a senior motor I have on the 19th of February and hadn’t heard anything, at least I’m not the only one.

[Mike Bray]

I got Eric’s senior kit:)

 

[Mark Traylor]

I did hear back from Maxspeed.  They sold kits out nearly immediately as they had an excruciatingly small quantity of kits.  They apparently do  have DD2 kits but that is all and just a few.   They wont have for for about 4 weeks.  I would think that there will be a ton sold, even to people well out of racing just so that the engines could be sold just as it was with HPV/KPV.  With the installed base of Rotax I would guess they will be selling near 2000 of these kits.  It seems like a nightmare for just a few people to wade through all the serial numbers and make calls back.  Maybe I am way off and only active racers will be buying any of the kits but if I had an engine just sitting around I think I would buy the kit so it can be sold.  after the kit goes to retail price an non upgraded engine wont be worth anything.

[josh martin]

The entire process is ridiculous. Who mandates a change involving their own product line with insufficient inventory? Our one rotax driver will miss the first two events of the season, and all they can tell us is how far behind they are. I don’t care. You dictate the change, be prepared to support it.

[Mark Traylor]

As far as missing race dates due to no upgrade kit I think most series are delaying implementation until parts are readily available.   That is a decision that is left up to the individual series.

That said I agree that the kits need to be offered once there is an ability to fullfill the demand.

[Christian Fox]

A bit strange that Evo parts are available at retail, but demand for upgrade kits clearly has not been satisfied. I think delayed implementation is inevitable.

[Mark Traylor]

That is odd Christian.  I asked a couple dealer friends about it and they had no parts but they have gotten complete engines.  They thought that the online guys selling parts are buying engines and offering the parts for sale.  I guess if someone is in a giant hurry to get the parts and start testing they may pay the retail prices for them.  I know I can’t do that but some people can.

[Christian Fox]

Ah, that makes more sense, Mark. Thanks

[Mark Traylor]

you can race with or without the upgrade in any series.  The Micro class sees the largest difference in performance.

[Wesley Legaspi]

How long does it take for maxspeed to call you back after submitting the paperwork and picture?  Sent mine in yesterday and have not heard from them.  Thanks.

[Mark Traylor]

Mine has been in 2.5 weeks.  No call back.   I did get emails back following emails to them.   They won’t contact you until they have a kit available for you.

[Brett Clatt]

I submitted my info for the Senior kit on February 17th and they sent my package on March 10th.

[Mark Parker]

 

So what is the difference in evo to prevo micros?

I was going to test a “before and after” but dont have tim

[Brett Clatt]

Going to take the new EVO Junior out Saturday morning for a couple of break in runs. I’ll post a video and opinion when we’re done.

https://www.facebook.com/pages/WMMC-Racing/480525108755364

 

[Mark Traylor]

Mark,

The micro is the one engine with very different performance numbers based on the published power curves.  For instance the Prevo peaked at 6.8hp at 6500 RPM and then continously falls off to 3.2hp at 10,500 RPM.  the Evo curve says it peaks at 8.1 hp at 7000 rpm and holds the 8hp 8200rpm then drops to 7hp and holds at 6.5 to 7 hp up to 11,000 rpm.   Then it drops quickly to 2.6hp at 12,000 rpm.   so the hp at 10,500 is double the Prevo.  There is about 30% more area under the Evo power curve compared to the Prevo.  The Evo will be quite a lot quicker than the Prevo (not upgraded).  Hoopefully the upgraded prevo will be on par with the full Evo.  The current murmurs seem to be positive in that respect but we will soon find out.

 

This is all from PUBLISHED curves.   Not real dyno data I have access to.  SO it all depends on how much the BRP marketing department pencil whipped the curves.

[Christian Fox]

If an EVO micro upgrade really does increase by hp~1.3, that should even the motors out a bit, which is something BRP wants to accomplish. Marginal differences in horsepower between different motors are diminished as baseline hp increases. A national level prevo micro will make close to 8hp now, an average prevo micro is around 7hp. In other words, it’s not even close.

[Mark Traylor]

yeah.  Question remains is can you take 200 cylinders, ignitions, carbs etc. and now make a 9hp micro.   we wont know for a while.  Maybe we get one year of better parody?  If there is money to spend someone will spend it.  You can not control spending, only complexity.

Once upgraded will that near 8hp micro now make 9 with no changes or will it still be about 8?  the impressive thing about the Evo micro curve is not the peak hp.  Peak hp can be really deceiving particularly in a single speed vehicle.  The width of the curve and area under it is what is impressive.

[Mark Parker]

A few random discussion points now that my evo kit is almost installed.

The header opening on the Evo is 4mm smaller than the Prevo and doesn’t come with a gasket. If mixing parts is ok for a while why wouldn’t I run the bigger header?

The wiring harness for a micro is the same as the dd2 so you still end up with a substantial ball of spare wire and even a few extra connectors.

The mount and the instructions are pure shit, anyone with pics of how theirs went together please post!

has anyone heard anything about certain cylinders being allowed and others not?

 

 

 

 

 

 

 

[Mark Traylor]

Yes Mark, the header is smaller and the muffler tube and outlet are larger.   To address the complexity comment I made above you can run all Prevo or all Evo (upgrade) but no mixing of the two.   You can not run the old header and new carb, or old ignition with new carb, or new ignition and old carb etc.   that sort of mix and match would create a nightmare matrix of complexity that would further the gap between the haves and have nots to the extreme.

There are unconfirmed rumors regarding the future of certain cylinders but it is all rumor and guessing that I do not care to broadcast publicly.

[Mark Traylor]

Mark Parks,

I am sure you realize this but don’t forget that the Evo micro does not use throttle stop in the new carburetor.

[Mark Parker]

I set the stop up on the pedal. Did I miss anything? We never ran it much in the old setup so I don’t really know what changed but did the old carb have the stop built in or ?

[Mark Traylor]

Mark Parks,

The Prevo micro carb requirs a stop that is inserted into the carb cap.  The split tube that has the cadmium plating on it.  It restricts the micro to about half throttle.  The  new XS carb on the micro does not use that stop inside the carburetor, you can run full throttle on the new carb.

Mark

[Brett Clatt]

Had the 2015 Junior EVO out at the track all weekend. Did the break in Saturday and ran it all day today. Here in Denver the altitude plays a big roll in jetting. We’ve been having one hell of a time getting the rpm over 12,200rpm. We’re down to a 120 main jet and 45/45 idle jets. It does produce awesome power from 8-11,000 rpm, but the sub 8,000rpm bog is devastating right now.

We broke it in at a one mile track that is fast. The Junior EVO performed great there, ran the same times as the Senior motor. On the tighter shorter course today we were struggling.

More testing next weekend.

[Mark Traylor]

Brett,

From what I have heard you are probably still really rich.   Others have been down to a 116 main on junior and that was at sea level.

[Brett Clatt]

Good to know. Thank you for that info. One guy at the track yesterday has a Senior EVO and he was running a 118 and said it still felt rich. Going to try a lot more combinations next weekend until we get it figured out. Kind of a new learning curve from what we were used to here at altitude with the pre-EVO motors.

[Mark Traylor]

Brett,

I thought with EVO you could not make any changes to the carb other than Main, needle position and idle air screw.   I thought inner and outer pilots, floats etc. were all fixed (float height ok within the legal range.   I was told that for micro anyway.   odd deal though is the smallest jet made for the carb ia  a 112 and will probably be too large for micro but thus far the range of legal jet (115-130) for micro are still all that will be legal.  Micros will be crazy rich is my guess.

[Wesley Legaspi]

Just got an email reply from Christine about the status of my order, they are currently out of stock, when they get a shipment in, the will start from orders received on feb.22. I should have placed my order when they made the initial announcement, not that I’m in a rush, but to save me from the agony of waiting for my order. Oh well.

[Brett Clatt]

Mark,

This is what I found for the 2015 regulations for the “Junior EVO” carb…. Please correct me if I’m reading this wrong. It looks as though that I can change the “Idle Jet” and “Inner Jet”. I think. LOL
Idle jets stamped 30, 35, 40, 45, 50, 55 and 60 only are legal to be used. It is not mandatory that idle jet and idle emulsion tube show the same size.

Plug gauge 0,65 mm may not enter the bore of the idle jet 60 (use jet gauge set Rotax part no. 281 920).

Idle emulsion tube:
Idle emulsion tube stamped 30, 35, 40, 45, 50, 55 and 60 are legal to

be used.

It is not mandatory that idle emulsion tube and idle jet show the same

size.

Plug gauge 0,65 mm may not enter the bore (use jet gauge set Rotax

part no. 281 920).”

 

[Bruce Woodrow]

Brett,

Sorry, no – those specs are for the prevo QS and QD carbs, the rules for the Evo XS carbs are:

Specific regulation for Dellorto VHSB 34 XS

Carburetor slide shows digits “45” in casting.

Jet needle must be stamped with “K57”.

Two floats marked “4,0 gr” are legal to be used only

Idle has to be stamped with “60”.

Idle emulsion tube has to be stamped with “45”

Needle jet  Stamped with ”DP267” Total length: 51,0 +/- 0,3 mm          Length of bottom section: 33,0 +/- 0,2 mm

Carburetor insert must show stamping “12,5”

 

Bruce

[Brett Clatt]

Bruce,

Thank you. That will save me some time and money. Going to try a 112 and 116 main this coming weekend. Got the needle position at 1. It may be a struggle to get the EVO motors lean enough here at altitude…..

Did Rotax specify a minimum jet size for the EVO Junior?

[Bruce Woodrow]

I haven’t seen any minimum jet size specified for Junior.

Be careful with the 112 jet as that is quite a big % reduction in flow area from the 116!

 

 

[Brett Clatt]

Bruce,

Totally understand the % reduction when you get that low. At 120 we absolutely can’t get above 12,200rpm with a 79 gear and a total weight of 325lbs. Racing in the mile high city adds another dynamic to jetting a 2cycle. Ordered jets from 112 to 118. Going to just try stepping down until we get higher RPM’s. Switched the idle jets back to 60/45. Thanks for info. I’ll post sunday night after we run to see if we can gain some RPM’s and low end.

[Mark Traylor]

No min that i am aware of.  The micro has a minimum of 115 so you could run your junior leaner leaner than a micro!

[Mark Parker]

I was told by a fellow at the track yesterday that he is running his evo micro jetted from 95-100. Is this a legal set up?

[Christian Fox]

Mark, it’s going to have to be legal for micros to run tiny jets; Rotax cannot afford to have EVOs running way too rich and being outgunned by old Max motors. For all the bs about the carb being super easy to tune, and every package running great on a 130…clearly that’s not the case, and if they ever hope to sell a new motor, they will have to let them be tuned to be competitive.

[Mark Traylor]

When I spoke to josh at COA there was no plan to change micro jet range yet.   I’m not sure how someone was running a 90.   I am pretty sure the jets that fit in these emulsion tubes only go down to 112. The 90 to 100 are the jets that cars used in the mini rok engines.   Those jets have a smaller thread.

[Bruce Woodrow]

Mark,

M6 thread jets for VHSB carbs appear to be available in sensible steps down to 44 and then jump to 30.  See here:

http://www.dellortodirect.com/Parts/PHVA-Parts/Dellorto-PHVA-6mm-Main-Jet

[Mark Traylor]

Thanks Bruce,

I have publicly flogged myself for stupidity this morning.   When I looked into smaller jets the dealer I spoke with told me the smaller ones were M5.    I must have gotten the new guy in the shop.   In the past I would call Josh Smith and tell him we need to change the rules on allowable jets for micromax, now I have no clue who to talk to there other than talk to my local dealers and get them to call.   Who knows.  I am sure it will be changed but they are still shipping Micromax engines with the 115-130 jet kit.   Just goes to show that BRP pretty much overlooked micro and mini.

[Mark Traylor]

I read through the March 16 regs.   the supplement for the Micro and Mini refer you to the main regs section 6.8 (should be 6.9) for the XS carb.  there is not specified range of jetting so my assumption is that Micro jetting is totally open.

[Gabriel Urrutia]

I ordered my evo upgrade 3 weeks  ago by email and I haven’t received any response yet from Rotax  then I faxed it again just to try a different way just in case 5 days ago but still not response yet . FWT is going on that maybe their excuse for their delay ..

[Vincent Ciolino]

Last I heard the update kits for the Micro’s are on back order.  They are working on the 02/20/2015 orders.

[Phil Laird]

I just installed my EVO ser max upgrade kit. I thought there were 2 settings for the power valve 7600rpm & 7900rpm , but I cant find anything printed on how to change from one to the other.  ?

[Bruce Woodrow]

Phil,

It’s all in here, see pages 86/87:

http://www.rotax-kart.com/upload/files/2465.pdf

Just one ground wire to connect/ disconnect.

[Phil Laird]

Got it..Thx

[Mark Parker]

Has anyone tested a new off the shelf evo against a old motor with the evo upgrade package? Save day same kid type of deal?

[Mark Traylor]

Mark Parks,

There has been some testing results that I have read saying that the upgraded engines are comparable to the new.   The testing was not extensive but sounded like they did a good job adding one evo component on at a time and comparing it to their best team equipent.   However they only ran Junior Senior, and DD2.  No mini or micro so as far as those go who knows.

[Brett Clatt]

Here’s some runs with the new EVO Junior motor on Monday at IMI here in Colorado.

Elevation: 5,400′, Temps: 56-70 degrees, Humidity: 17%, Fuel/Oil: 91oct 44:1 mix, Needle Position: 1, Motor temp: 155-163

128 main jet 13,148 rpm

125 main jet 13,191 rpm

122 main jet 13,210 rpm

120 main jet 13,315 rpm

119 main jet 13,024 rpm

118 main jet 12,988 rpm

117 main jet 12,721 rpm

116 main jet 12,973 rpm

We would do two hard pulls on the long back stretch to see what our RPM would climb to. Didn’t have any “popping” even with the 116 jet. Ran 79/12 gearing to make sure we got the RPM’s up. And had a new IW27 plug in. We’ll be going out again next weekend.

 

 

 

 

 

 

 

 

 

 

 

 

 

[andy graham]

No one is mentioning lap times from their testing….are you any faster with the upgrades?

[Brett Clatt]

andy-graham

We haven’t got the Junior running 100% yet, but my son did say that the motor felt very strong compared to his Senior motor in the 8-11,000rpm range. Haven’t tracked lap times since we are still fine tuning. I’ll post with comparative times when we get to that point.

[Gabriel Urrutia]

who knows Maybe faster than the way they are processing  orders . It has been a month since I  Ordered my upgrades by email & fax : no response yet, no call , no delivery just NOTHING

[Mark Parker]

You will get a call from a (954) number when your parts are ready to pay for. The fellow i saw testing the micro said it was much faster.

[Gabriel Urrutia]

I have not received any call from 954 number neither email yet .

[mark sawatsky]

I ordered two Evo DD2 kits in December and got both of them two weeks ago. Everything bolted to the engine looks fine and I really like the new wiring harness that eliminates all the wires going up to the steering column, but I have concerns about the new start switch and battery cover. The cover clips on the front and uses one M6 screw to hold it at the back. It is very easy to not get the front clipped properly, which will result in a battery bouncing across the track. It also makes disconnecting the battery at the end of the day a little more difficult, and the start switch feels really low quality, with lots of free play and cheap plastic.

[Eric Jacky]

We received our upgrade kit for our MicroMax last week and were able to run it this weekend at Orlando Kart Center against a non-upgraded micro.  Our initial impression is not overly positive.  We spent all day trying to get it to run.  We started with the 130 jet, and went down as low as 125 before settling for 128.  We tried various plugs.  It never ran right, we could put it on the stand and run the throttle flat out, never getting more than 8700 rpm.   We would normally expect to see upwards of 11,000 unloaded on the stand. On track we hit 8600 for the most part, well short of 9400 we would normally expect under full load.

Our lap times were hit and miss. We saw one 65 second lap, (by comparisons, FWT kids were hitting 60s.  My son is relatively new, but it was discouraging for all of us that it wasn’t remotely faster.  The one difference we did notice that was positive was the low end grunt, but on the two long straights at OKC, you could hear it basically rev limit half way down the straight and that was it.  We hit 50mph once all day, we normally hit 48-49, but spent all day basically where we are usually at with the normal kit.  We were expecting to be able to achieve at least 52-53 or more with the new kit.

I see people talking about 115 jets, we didn’t feel comfortable going that lean, but might try it wednesday ahead of the next Ocala Rotax race this weekend.  In the end, I have a feeling we’ll go back to the standard setup, we need RPM at Ocala.  Wish these kits would have been available to test sooner than after the season’s already started.

[Mark Traylor]

Eric,

I think you are still just far too rich.  Remember that your engine requires a certain amount of fuel to make a certain amount of horsepower, but a completely different carburetor will deliver fuel differently.  Basically you cant compare a 128 in the old carb to a 128 in the new carb even though they look the same.  the floats are richer, the idle circuit is richer, the needle and the emulsion tube are totally different so you end up with a completely different tune.   We had a senior out on saturday with an upgrade and he was down to a 120 main.  Other micros I have heard about are all under a 110 and I have heard ranges of 90-105 for mains on the micro.  I run a 125 typically on the current engine config.   Also remeber witht he old carb you had the throttle stop in so the needle never opened the emulsion tube and ran completely on the main jet, the new carb doesnt use the trottle stop and runs as the carb is designed to, on the needle for part throttle and on the main at full.

Did you pull the pipe and look at it?  My bet is that it is very black and probably a little wet too.

[Bruce Woodrow]

Eric,

I agree with Mark – everything indicates that much smaller jets are required with the XS carb., compared to QS/QD. Also, you should limit the throttle travel, as beyond a certain opening no more air can get into the engine because of the exhaust restrictor – opening the throttle further just messes up the mixture preparation as the air velocity past the slide reduces.

Some MicroMax Evo Q&A from Australia:

2.1) 125 Micro MAX

Q: Which upgrades for existing engines are mandatory or recommended?

A: Mandatory upgrades are:

– 18 mm exhaust socket with gasket ring

– Perforated tube silencer with 22 mm elbow

– Squish gap

A: Recommended upgrades are:

– XS carburettor

Q: Is it necessary to install the new Dellorto Ignition System to my existing engine?

A: No, it is not necessary as the Dellorto Ignition System will provide the same engine performance as the

existing Denso Ignition System.

Q: What is the benefit of the new Dellorto Ignition System?

A: More equal engine performance, improved throttle response, easier to use, less manipulation possibilities.

Q: Is there a stop sleeve in the new XS carburettor to limit the opening of the carburettor slide?

A: No, but it is recommended to set the accelerator pedal stop to a 60-80% opening of the carburettor slide

(depending on driver’s pedal length preference).

Q: Will a different maximum opening of the carburettor slide have an impact on the maximum

performance of the engine?

A: No, but the improved ease of applying the throttle might improve lap times.

Q: Will the new 125 Micro MAX specification result in faster lap times?

A: Yes, but just slightly.

[Eric Jacky]

Thank you Mark and Bruce, I’ll try those things you suggest.   We gotta figure out something quick or just plan to put the old system back on for the race this weekend.  Will see how it goes Wednesday evening.

[Mark Parker]

Put a 100 jet in and let it rip

[Aaron LaRoque]

I see where people are using jets smaller than a 100, specifically for micromax.  You cannot do that for any class, you have to use only the jets available from Rotax or you will get a DQ.  The smallest jet they have available in their kits is a 100, and its available in kit number 281 477.  You can also only use jets that are in their size range.   In that jet kit, the jets are 100, 102, 105, 108, 110, and 112.  If you buy a 104 from Delorto and use it in your carb, you will get a DQ if they tech you.

[Rob Kozakowski]

Aaron, where does it say that?

All I can find is:

Mini and Micro Appendix:

6.9 j) OLD CARB – “Main jet is free but limited to those supplied in the Rotax Micro MAX jet package (ROTAX part 281476, which includes main jets: 115-118-120-122-125-128-130).”

Right below, it says for the NEW CARB “Regulation for XS carburetor: Section 6.8 fo the 2015 RMC Technical Regulations apply.”

In the RMC Tech Regs:

6.8 talks about the intake silencer, so I’ll assume that it should be 6.9…

At 6.9 there is nothing that talks about main jets.

So, it looks to me that:

1) NEW CARB – main jet is open.

2) OLD CARBS – main jet is restricted in MicroMax only.

[Ambrose Buldo]

Trying to get my SR MAX EVO Upgrade Kit. I do NOT have acess to the Passport (In Trailer), where can I find the S/N on the Max Engine. I sent picture of the Number stamped on the engine just in front of the clutch cover and I am being told that is NOT it.

Thanks in advance for the information. Looking to get this order placed, processed and gettign the upgrade.

Regards…

[Mark Traylor]

Ambrose,

the serial number is the dot peened number typically 7 digits long that is at about the 2:00 position when looking at the clutch.

[M Crotty]

I have a 2002 Sr. with the bolt on evo upgrades, the local track is at 4300 feet so we jet a bit lean.

On a 70 degree day I started with a 130 jet and kept stepping down to try and find the pop. At 112 I ran out of jets and never heard the pop, although I seemed to get best revs around 118.

I’m a beginner, so my best revs may have been due to my mood rather than the jet, still too early to tell. It seems to come up to speed faster than it used to, a bit less bogging, but again consider your source.

Do you think one jet above popping is still a valid strategy? Anyone ever achieve popping on an evo?

[Brett Clatt]

M Crotty

We have the 2015 Junior and ran the jet down to a 115 and the motor temp at 164 degrees and we had no pop to indicate that the motor was too lean. We tested from 130 down to 115 and noticed a definite wave pattern in the RPM’s with a 120 jet giving us the best performance.

Maybe the “pop” indicator is no longer valid…..?

[Mark Traylor]

I have heard that Maxspeed is expecting a shipment of parts this week to hopefully complete a bunch of kits (hopefully micro kits for me).  That said we had a race this weekend with some interesting results.

We had 4 micromax, three upgraded and 1 prevo.  a couple had the option to run new evo engones but ended up stripping parts off the new evo and upgrading the prevo.  Basically the evo is better tha prevo as everyone would expect but the upraded prevo was better than the new evo.  the engines that were upgraded were good engines to start with.   So basically if you have a good engine you will in all liklihood still have a good engine and better than a new evo out of the box.  I am sure there will still be the hunt for good cylinders that are lettered.  It does not seem that an out of the box engine will run with an upgraded engine that has gone through parts selection and development.

We did not have an upgrade yet so we elected to run in the LO206 Briggs class.

[Eric Alexander]

Just a heads up: I just had MaxSpeed fulfill my Junior EVO kit today and was told some more senior kits should go out in the next couple of weeks.

[Adrian Baran]

When did everyone send in their order form? I sent mine out on March 8th and have yet to get any response. I even emailed them to follow up on everything, and they’ve not gotten back to me. I really wish they communicated better on where everyone’s order is.

[Bruce Woodrow]

Placed my order on Feb. 25th, had two updates following further inquiries, last one on April 13th which said:

We are still waiting for our shipment. We are doing our best to satisfy the west coast once we receive.
We will contact you when ready to ship. Hopefully real soon

[Gabriel Urrutia]

I emailed and faxed everything early March and nothing has been confirmed or anything by Rotax  YET. They might have been receiving lots of order but come on how are you gonna put something as “EVO” for Rotax on the market if don’t have capacity  to at least confirm orders. It takes time maybe , patience & smile  thats all I could say

[Adrian Baran]

Appreciate the responses mainly I’m concerned about them losing my order or something happening causing me to have to pay full price for these upgrades…

[Eric Alexander]

I placed my order back in February (one junior and three seniors).  I didn’t hear anything from MaxSpeed until one of the kits was ready to ship last week.  Just as they said, they contacted me for my payment info.

While on the phone, I asked about the process.  Its a matter of first come – first served based on two things: the current supply of kits and making sure everyone gets one kit before those with more than one motor gets their full request filled.  So when inquiring about my three senior kits, I was told they’d be getting more seniors in this week and I would get one of those.  I then asked if they would eventually fulfill my entire order for the remaining two kits and was told yes.

So I don’t believe there’s any reason for panic over the EVO update kits.  They just have a lot of people requesting them and have to wait for kits from Rotax.  Remember this is a big update and its worldwide.  Its going to take some time.

[Steve piggott]

i agree with you eric, i was in a panic to get my kit and when i got it, it was incomplete. i called back and they were very responsive to get my order right. in this process i could tell they are doing everything they can do to get out the orders. factory supply is the hold up. not maxspeed.

[Mark Traylor]

I placed my order on day 2 that they order form was available.  The problem is that the whole program was rolled out incomplete and in a very inefficient way.  There is a world wide distribution network for one.  Use it.  the upgrades should not have even been offered until there was a reasonable supply available.  When the order forms were made available there were only 10 upgrade kits available.  Sorry but that is ridiculous.   At least on the micro max side the deal was rolled out prematurely, there was no testing done and now it is being done on the fly.  People are running races and there are some competitors with new engines and those without, maybe not a big deal in senior but in micromax it renders the prevo uncometitive and now there are new throttle stops being passed out the first day of a national racing series.

lessons to be learned:

1)  Get the technical work done in advance so you are not bandaiding along  the way.

2)  Get parts in stock in sufficient quantity before releasing order forms

3)  Use the vast dealer network to your advantage as to avoid overloading a small office staff that is not geared up to handle a direct to end user distribution nightmare.

[Mark Traylor]

There have been some micro kits shipped witht he wrong exhaust stinger.  Maxspeed has a list and they are working it but I know at least 2 guys in SC that got the wrong one.  If you got a kit with no turndown on the stinger they sent you the wrong one.   Give them a call so they can get it taken care of.

[Mark Parker]

I have no turn down on my stinger.

i faced in my paperwork and photos 2 hours after the paper was made available. I’ve had the kit for some time now.

 

will it run better without the stinger?

[Mark Traylor]

I emailed mine in a couple days after opening and did get a call this week.  It should be about the same with or without the turdown.  maybe a tiny bit better without it.   They are working on replacing them.  you should call them.

[Gabriel Urrutia]

Finally I decided to call  (954) 251-0017 instead of waiting more . They were able to easily find my order using my fax number or email . I was told my order was soon to be arrived at max speed and be delivered soon ; then next day they called back asking me for Credit Card to process order . Update  total is $527.02  for senior / master  including s/h and taxes . Hopefully I will receive it very soon and I will update everybody about self installation and results on track ..!

[Gabriel Urrutia]

I just received the Evo upgrade But I noticed there is 130 Jet in  so I am guessing that’s rich so I have to buy all  available jets maybe from 120 to 130 to go little lean when needed . With my old carbs I was using from 152-160 jets so maybe with this theory somebody here could just give me a better advice about this new 2015 Carbs

[Steve piggott]

Gabriel, read past post, many on this issue. And test test test to to find (yours), no one answer or jet size, some say 128 some say 131

[Adrian Baran]

Just got a call about my order. Hopefully I’ll be ready to start testing next weekend once I put everything together.

[Ivan Duarte]

Before I go out to buy jets for the new carb, does anybody know what the new “range” of jet size is for the Sr engine?

[Ambrose Buldo]

Adrian – When ddi yu place your order? Still waiting for the “Call” on mine.

Also intrested in Jet suggestions for the upgraded Sr.

[Gabriel Urrutia]

As it was suggested here before maybe you could order 115-118-120-122-125-128-130

[Gabriel Urrutia]

130 could be very rich so I am at Florida I would order 115-118-120-122-125-128-130 for jets  over 130 only  if anybody lived at Very Cold place as Alaska maybe , Correct me somebody if I am wrong

[Adrian Baran]

Ambrose, I placed my order on March 8th. I’ve also heard that 115-130 for warmer weather regarding jets although I will be doing some testing once I get my motor and kart assembled.

[Brett Clatt]

I have 110-130 jets for the new EVO Junior motor. Here at altitude we were able to get over 13,300+rpm using the 120 jet. Using the 130 it came with we only topped out at 11,800rpm.

Also, when we tested smaller jets we never came across the “popping” that signifies too lean like we did with the old style motors.

[Vincent Ciolino]

<span style=”font-size: 11.0pt; font-family: ‘Calibri’,sans-serif; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: ‘Times New Roman’; mso-bidi-theme-font: minor-bidi; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;”>Just got our upgrade kit.  What are the legal main jet sizes that I can use in the MicroMax class ?  And what is the recommended size for Florida?</span>

[Vincent Ciolino]

We just got our upgrade kit.  What are the legal main jet sizes we can use?

 

[Mark Traylor]

Micro max is now open on the jetting.  Not restricted to the one kit of jets.

[Brett Clatt]

What kind of temp are you all running your EVO’s at? Ours seems to really like 165degrees.

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