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Todd Kageals
Joined: 15 Jun 2012
Posts: 279
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 Posted: Sun Oct 14, 2012 6:45 pm Post subject: 1st Track Outing |
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Guys,
http://www.youtube.com/watch?v=HPXYc_kA5qE
I took my kart out to Mooresville Motorplex this weekend. I ran for 2.5 sessions (about 25 minutes total) and then the engine died coming out of a turn. Got it back to the pits and towed it home. See the video above for the damage. I'm not sure where all that metal came from the piston is not missing any pieces, just beat up from the metal bouncing around in there I guess. I was running a 180 main jet at the time. This thing has not run right for a LONG time. It was running OK for the first 20 minutes but never felt very strong. I'm going to completely rebuild it. I assume the crank is not supposed to bind the way it is doing. The spare engine I have spins free and smooth. The one on the kart binds so I assume something has happened to the crank???? Any ideas on where all that metal came from????
On another note.....this was the first weekend Mooresville was open. What an awesome facility. Just like a miniature F1 track. Ultra smooth surface and 1st class supporting facilities. Not many karts there this weekend so it was an excellent opportunity to get some seat time (too bad my motor let me down). Check out MMXKARTING.com if you are not familiar with Mooresville. |
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Chris Hurst
Joined: 27 Jul 2007
Posts: 572
Location: United States, California,
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| Posted: Sun Oct 14, 2012 7:20 pm Post subject: Re: 1st Track Outing |
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| Todd Kageals wrote: | Guys,
http://www.youtube.com/watch?v=HPXYc_kA5qE
I took my kart out to Mooresville Motorplex this weekend. I ran for 2.5 sessions (about 25 minutes total) and then the engine died coming out of a turn. Got it back to the pits and towed it home. See the video above for the damage. I'm not sure where all that metal came from the piston is not missing any pieces, just beat up from the metal bouncing around in there I guess. I was running a 180 main jet at the time. This thing has not run right for a LONG time. It was running OK for the first 20 minutes but never felt very strong. I'm going to completely rebuild it. I assume the crank is not supposed to bind the way it is doing. The spare engine I have spins free and smooth. The one on the kart binds so I assume something has happened to the crank???? Any ideas on where all that metal came from????
On another note.....this was the first weekend Mooresville was open. What an awesome facility. Just like a miniature F1 track. Ultra smooth surface and 1st class supporting facilities. Not many karts there this weekend so it was an excellent opportunity to get some seat time (too bad my motor let me down). Check out MMXKARTING.com if you are not familiar with Mooresville. |
Used to live in Mooresville Todd. Talbert Woods if you know where that is.
It looks like the piston was really pitted and showing signs of detonation. I did the same thing to my first kart motor and it was due to the fact I was running way too lean.
It's possible that the tolerances in the motor were not built to spec or that the carb was run too lean. When you rebuild the engine if you have the know how be sure to check all the tolerances and make sure they are within manufacturers specs.
Get the baseline specifications for what your carb should be set to and work up from there. Also make sure you're fuel and oil were mixed in correct proportions.
As far as jetting goes I'm not in the know with these motors so ask around on the forums for that.
As far as the crank binding up it definitely should spin freely. When I was in school and got the opportunity to assemble a Nascar V8 we were told if you can't spin the crank / piston assembly by hand you've done something very wrong.
If you've ensured all the tolerances are set to spec and you're fuel is mixed correctly I would have to say it was an improperly adjusted carb unless someone on the board can educate me on something CR125 specific.
Good luck! |
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Chris Hurst
Joined: 27 Jul 2007
Posts: 572
Location: United States, California,
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| Posted: Sun Oct 14, 2012 7:22 pm Post subject: Re: 1st Track Outing |
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Double posted for some reason.
Last edited by Chris Hurst on Mon Oct 15, 2012 12:26 am, edited 1 time in total |
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Paul Makarucha
Joined: 11 Jun 2002
Posts: 890
Location: United States, New Jersey,
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Steve Buckner
Joined: 22 Apr 2003
Posts: 839
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| Posted: Sun Oct 14, 2012 7:40 pm Post subject: |
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| Paul Makarucha wrote: | | Bottom end bearing went bye bye |
Yepers. |
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Clark Gaynor
Joined: 29 Aug 2002
Posts: 541
Location: United States, Pennsylvania,
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| Posted: Mon Oct 15, 2012 9:09 am Post subject: |
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Yep, bottom end bearing!! Not much question there.
Any idea how many hours are on it? They will only live so long.
Running a Stock Honda, road racing, we put a crank in it every two seasons and the old crank, big end, and main bearing are always fine. We change it for safety reasons.
You'll need a crank assy as a minimum.
Clark. |
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Tim Salvino
Joined: 20 Nov 2010
Posts: 261
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| Posted: Mon Oct 15, 2012 11:39 am Post subject: |
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Yep, bottom end bearing. Look at the bottom of the rod, there should be a slot in it to see the bearing through, or, what's left of the bearing....
Just be glad it's not an ICC  |
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Bernard Muminovic
Joined: 24 Jul 2009
Posts: 624
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Todd Kageals
Joined: 15 Jun 2012
Posts: 279
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| Posted: Tue Oct 16, 2012 12:15 pm Post subject: |
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| Well....could have been done cheaper but I bought all new OEM components. New: cylinder, piston kit, crank kit, gasket kit, every oil seal, all new hardware, and every bearing in the engine. I should have a new engine with the exception of the transmission and the cases. About $1100 including shipping |
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Jason Bane
Joined: 01 Aug 2009
Posts: 282
Location: United States, Alabama, Gadsden
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| Posted: Tue Oct 16, 2012 1:53 pm Post subject: |
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| Sorry that happened, tough break. If it makes you feel better, I stuck my first engine during my first race a few years back. It was a Rotax, and I later decided that I was running it a little too lean on a cold day. I remember your previous threads trying to get it to run correctly. What main jet did you have in it? |
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Tyson Henry
Joined: 10 Aug 2011
Posts: 359
Location: United States, Texas, Arlington
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| Posted: Thu Oct 18, 2012 11:46 am Post subject: |
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| Todd Kageals wrote: | | Well....could have been done cheaper but I bought all new OEM components. New: cylinder, piston kit, crank kit, gasket kit, every oil seal, all new hardware, and every bearing in the engine. I should have a new engine with the exception of the transmission and the cases. About $1100 including shipping |
Not sure where you got all your parts, but just letting you know, for future reference, that powersportsplus.com has really amazing prices and free shipping on any order over 250. All those parts could have been ordered for less than $800. |
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joseph hollinger
Joined: 12 Sep 2002
Posts: 9532
Location: United States, California, san francisco
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| Posted: Thu Oct 18, 2012 12:55 pm Post subject: |
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| Todd Kageals wrote: | | Well....could have been done cheaper but I bought all new OEM components. New: cylinder, piston kit, crank kit, gasket kit, every oil seal, all new hardware, and every bearing in the engine. I should have a new engine with the exception of the transmission and the cases. About $1100 including shipping |
Pretty major order. I'd be really careful about throwing all that stuff into old cases. At least I'd want to be absolutely sure that the new bearings fit the cases with the correct tolerances. I think the kit motor is available for around $1500. That might have been a better option.
_________________
A lie gets halfway around the world before the truth has a chance to get its pants on. -- Winston Churchill. |
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Todd Kageals
Joined: 15 Jun 2012
Posts: 279
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| Posted: Tue Nov 06, 2012 8:38 am Post subject: |
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| Where can you get the kit motor for $1500????? I was quoted $2500 through HPD so I gave up on that option. I ordered all the parts through servicehonda.com . I'm going to guess that the prices are pretty close to the best you can get. I added a few things like all new bolts/studs, reed cage assembly, rubber carb boot thing, etc. Still....I'll check that site next time I need something to compare prices. |
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Todd Kageals
Joined: 15 Jun 2012
Posts: 279
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| Posted: Tue Nov 06, 2012 9:11 am Post subject: |
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| Just for everyone's reference......I checked the prices at the site quoted above (just a couple of parts, not all of the them) and found that servicehonda.com was cheaper in most cases than the site listed in the above post. About $5.00 or so on the cylinder....same price on the head....so....looks like the sites are pretty close to one another on the prices. Servicehonda has always sent my stuff quickly and the orders have always been right. I used to run Honda jetskis and ordered a LOT of parts over the years from them. |
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Tyson Henry
Joined: 10 Aug 2011
Posts: 359
Location: United States, Texas, Arlington
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| Posted: Tue Nov 06, 2012 10:20 am Post subject: |
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| Todd Kageals wrote: | | Just for everyone's reference......I checked the prices at the site quoted above (just a couple of parts, not all of the them) and found that servicehonda.com was cheaper in most cases than the site listed in the above post. About $5.00 or so on the cylinder....same price on the head....so....looks like the sites are pretty close to one another on the prices. Servicehonda has always sent my stuff quickly and the orders have always been right. I used to run Honda jetskis and ordered a LOT of parts over the years from them. |
Just for everyone's reference I checked all the prices for a full rebuild, including a new cylinder, and the total came to 604.82 at powersportsplus.com and you get free shipping. At servicehonda the total was 609.25 and the quoted shipping was $65 for a total of 674.25.
Powesportsplus has always sent my orders quickly and provided good service.
So in closing, powersportsplus.com is cheaper.
Thank you. |
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