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Viewing 25 posts - 1 through 25 (of 59 total)
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  • #33563

    Eric Alexander
    Participant

    Absolutely!  Thanks Troy.

    #33561

    Eric Alexander
    Participant

    Some days I have waayyy to much time. LOL!

     

    #33463

    Eric Alexander
    Participant

    Great to know. Thanks!

    #33454

    Eric Alexander
    Participant

    Here’s some pictures to underline what I’m asking about.

    #33218

    Eric Alexander
    Participant

    LO206 is a good option at GoPro Motorplex.  They’ve just started a Wednesday night series around the rental karts that features an LO206 racing karts class.  Spec Hoosier EL26 hard compound tires and a simple walk-up $40 registration fee.  Its about as inexpensive as kart racing can be.

    #32899

    Eric Alexander
    Participant

    I use products called Rapid Prep and Rapid Tac.

    Rapid Prep removes the oils and grime on the surface.  Its works so will that I bought a large size and use it to clean the plastics regularly.  Preparation of the surface is the most important part to get the graphics to adhere.

    After the plastics are clean, spray the surface with Rapid Tac.  This will allow you to slide the graphic over the surface to line it up correctly.  After that use a small, soft squeegee and work from the center out to remove the application fluid and air bubbles.

    Once down, you can use a hair dryer to set the adhesive.  Also at this stage you can use heat to mold the graphic around any corners where it doesn’t sit well (most graphics will have a split in the vinyl to accomplish this over complex shapes).  Don’t use too much heat as you’ll stretch the graphic and then it will never lay flat over the surface.  Always work towards the split.

    #32484

    Eric Alexander
    Participant

    Some use an old axle (or any long steel pipe) that you can get some leverage going with.  Be sure to wrap it with some thick fabric like a towel to prevent scratching the frame.  A quick search on YouTube will give you result showing how its done.

    #32311

    Eric Alexander
    Participant

    Thanks Kirk.  Nice to hear the benefit.  Sliding the rear through the corners is exactly what I’m trying to resolve.

    #30078

    Eric Alexander
    Participant

    I second David’s comment re: Briggs LO206 class.  Its affordable and the formula will allow her to focus more on racing rather than tuning.  Rotax would be fast enough that tuning the kart becomes a bigger part of the equation and that might make it less fun if she can’t be competitive.

    As for chassis: at GoPro Motorplex I’d go with Arrow as they can provide a lot of support for the chassis there. And the majority of garage owners there have Arrow karts so you can get more advice for set-ups and what not.

    #30042

    Eric Alexander
    Participant

    So another thought is the starter bushing wire has started to come undone.  It might even be touching the starter cover (which *might* short out the electrical system and cause the kart to stop running on the track).  If you only have a thread or two of the braided wiring in the bushing connected I could see that causing the starter issue.  And the bushing wiring is a known item that wears over time.  If anyone at the track has a spare starter you could try swapping out and seeing what that does.

    If you race Rotax, a spare starter is a must for your spares kit.

    #29943

    Eric Alexander
    Participant

    First two things I’d check are fuel pump and battery.

    Fuel pump: when the diaphragm wears out it stretches out and stops pumping fuel efficiently.  It shows up as miss-firing and hesitation on the track, and if unchecked eventually leads to the engine just dying.

    But a bad battery will do the same.  If it will not hold a charge it will start out strong and quickly fail to run the kart out on the track.  Also a bad battery can have enough voltage to spin the starter but not engage the flywheel and therefore not turn the engine over.

    After checking those two, I’d start looking at the wiring harness.

    #27235

    Eric Alexander
    Participant

    Will do.  I haven’t gotten back to the track, but I wanted to let you know something you said clicked.

    “Typically things that will make the kart turn-in better will conversely hurt your exit”

    That’s really good info.  With the lack of grip on the track, I was really focused on entry.  When I had the entry working well, the push on exit became an issue.  I do think the rear was lifting too quickly – and therefore down to soon.

    None the less, really valuable words there.  Thanks again.

    #27092

    Eric Alexander
    Participant

    Thanks TJ.  I was hoping to get someone like you to chime in on this.  I’ll try the camber adjustment and then start narrowing the rear incrementally since I’m at the max now.

    #26685

    Eric Alexander
    Participant

    Buy yourself a sonic cleaner from Harbor Freight for cheap (like under $50.00).  Then break down the carb and let the sonic cleaner do its thing on all the parts except the needle and the gaskets.  I do this on a regular basis using dawn dishwater cleaner.

    #22514

    Eric Alexander
    Participant

    The cylinder MY is cast on the right side on the intake.  Its a two digit number inside a circle.

    The main case has a serial number stamped on the right side just ahead of the clutch fly wheel (on a smooth flat area).  You’ll need to reference this serial number with a Rotax agent to identify the MY of the casing.

    #22495

    Eric Alexander
    Participant

    The starter is prone to vibration breaking the electrical leads going to the bushings.  The design IMO is poorly engineered as the lead is soldered at a right angle to the way the bushing moves and that stresses the solder connection.  Its a fairly simple fix – starter rebuild kit is cost effective and it takes about 30 minutes.  Most guys racing will carry a back-up starter.

    #20831

    Eric Alexander
    Participant

    Just putting this out there:  the thing that makes Mooresville work so well is the 40-plus garages they have rented out.  Kart owners store and work on the karts there, and this make a great environment for consession karters to come to.  There’s always a racing kart lapping there and I find the guys who rent the consession karts really like watching those.

    Like mentioned above, MMX runs 10 minute sessions, alternating between rentals and racing karts when both are looking for track time.  When there’s no consession karts, the track is open to kart owners.

    Having the garages there makes things very convenient for kart owners and there’s always a kart owner or two there.  At tracks I’ve visited without garages – when I’ve had to transport my karts there –  I’ve typically been the only kart on track.  IMHO, having this type of day in and day out activity is the backbone for a successful track.  It brings new karters in, exposes them to racing karts, and creates a community around the drivers at the track.

    #19969

    Eric Alexander
    Participant

    Just wanted to follow-up here.  I found the 4hz GPS mode is only available in the 17.5 firmware for the camera.  I managed to find the firmware version and manually set the GPS record frequency to (4).

    #19967

    Eric Alexander
    Participant

    Bill,

    I researched the same thing over the past six months.  What I came up with was a ContourGPS camera, my existing Mychron dash, and Dashware software.  The ContourGPS camera has built-in GPS that gives you accurate positioning, G-forces and speed.  Dashware allows you to load the video file from the ContourGPS and it automatically extracts the GPS data.  Dashware also allows you to create custom gauges easily to display the info.  Lastly it pulls in the Mychron data for revs and laptimes.

    I picked up a second hand, like-new, ContourGPS on eBay for $100.00.  The Dashware software is only $50.00.  So it was really an affordable package.

    Here’s a link to a video I created:  http://www.raceralex.com/video/MMX-2013-12-17-01_720P-LQ.wmv  It’s the lowest HD quality you can render using Dashware and is the actual video (not some YouTube compressed file).

    Using Dashware I created a decent track map for GoPro motorplex and a MyChron3 gauge for the display.  For the price I think its pretty effective with anything I’ve seen.

     

    #19820

    Eric Alexander
    Participant

    Ted, the closest Rotax Service Center is Kartsport North America located at the GoPro Motorplex in Mooresville North Carolina.  They can breakdown, inspect, and reseal your engine and reissue a replacement passport.

    #18265

    Eric Alexander
    Participant

    So Walt, should the grease be applied between the piston and the back of the pad?

    #18250

    Eric Alexander
    Participant

    Thanks Tony.  I spoke with Dave Davis at CRG America and he said the 2000-up caliper will wear the pads a bit uneven.  The 2000-up system has dual calipers on the rotor, but only a single piston per pad – per caliper, so I don’t think its the pistons.  I’m going to mic the rotor next time I’m at the garage to see if possible the rotor has worn unevenly and may be contributing.

    #15158

    Eric Alexander
    Participant

    This will be interesting to watch considering the uproar early this season when the Leopard wasn’t competitive with the Rotax.

    #15059

    Eric Alexander
    Participant

    The new style clutch greatly improves reliability.  So much so that updating the clutch is a must do IMHO.

    Updating is fairly simple and there are step by step instuctions from Rotax avaliable online. You will need a clutch puller for the flywheel and a torque wrench to match specs.

    #14394

    Eric Alexander
    Participant

    I bought my Rotax karts back in 2010 – a matching pair of 2005 CRG Kalifornia’s with same year engines.  The karts had been sitting up in NJ for a year or so.  I disassembled the karts and rebuilt them from the ground up.  I then couldn’t even get the engine’s to fire up.  LOL!  So, I started sorting the engines.  In the end, the 8-year old motors today fire-up nicely and perform smoothly on the track.  And my karting experience is far better as a result of all the hands-on time fixing and fine-tuning everything.  I was at the track yesterday and my biggest complaint was that I threw a chain.   =)

    Good luck!

Viewing 25 posts - 1 through 25 (of 59 total)