cr500 in a 250r frame

[DirtDemon]

KRRZ350, I am running 12/39 gearing, but I think it is too low, I am going to run 14/39 or 15/39 when I get put back together.

[Paulie B]

Is truing and balancing the same thing?
If not how do they balance the crank?

[hilpp99]

truing the crank is making it straight, balancing is adding or taking weight from the crank to match the piston and rod weight.

[mcgyver331]

Originally Posted by hilpp99

I am doing the conversion right now as matter of fact. Last night I finished my exhaust. I haven't had to cut the frame at all for the engine. All the motor mounts my father and I have made and they are on rubber. So far the exhaust has been the toughest part, we had to cut and twist the pipe quite a bit but it fits nice now. If I can figure out how to post pictures I will.

Poly bushings would work well but rubber ?? better keep those mounts real tight or you ll be throwing chains left and right under load.




I put an old yz 400 motor in a suzuki lt 230 quad.

ATV - Snowmobile - Dirt Bike - Anything and Everything 2-Strokel

[Paulie B]

Originally Posted by hilpp99

truing the crank is making it straight, balancing is adding or taking weight from the crank to match the piston and rod weight.

K thanks. The guy who rebuilt my crank said truing it would lessen the vibrations.

[trxOneMillion]

Mine's running again! Made 43hp and 62ft-lbs. Im ok with that, the guy who tuned it said it was a real pain in the ass with the fmf 250r pipe on it and its acting weird on this motor. So il be having pipe made for it next year but for this summershes ready to go. Oh and by the way i am trx500rex, not sure why i was banned must have had to much to drink one night.



I will post the dyno slip as well as some videos later if your intrested.

[siderbox]

Looking good.
Vids would be good.

btw It's either my computer or you had one too many when you took that pic.

[Paulie B]

Originally Posted by trxOneMillion

Mine's running again! Made 43hp and 62ft-lbs. Im ok with that, the guy who tuned it said it was a real pain in the ass with the fmf 250r pipe on it and its acting weird on this motor. So il be having pipe made for it next year but for this summershes ready to go. Oh and by the way i am trx500rex, not sure why i was banned must have had to much to drink one night.



I will post the dyno slip as well as some videos later if your intrested.

Oh snap I seen that ride over on atvriders.
I like it.
Cool color scheme you got goin on there.
BTW Welcome to E2S your quad was made for this site

[trxOneMillion]

Ok, well for the most part it runs great, first and second hit hard but at the end of third it starts acting weird. In third it bogs and if i shift to fourth it revs on its own and revs all the way up when i pull the clutch in. Im guessing maybe the floats? because when i coast to a stop it idles fine then i can go again. Im gona call my dyno guy tomorow and see what he thinks.

I might need to invest in a bigger tank as it lasts about an hour, everything else works flawlessly. Oh and my motor mounts didnt break and i dont notice the vibes at all. Maybe my mounts are special or somthing, or maybe my crank was ballenced in the past, or possibly most people are incredebly over exadurating the vibration.

[CR480R]

Originally Posted by trxOneMillion

Ok, well for the most part it runs great, first and second hit hard but at the end of third it starts acting weird. In third it bogs and if i shift to fourth it revs on its own and revs all the way up when i pull the clutch in. Im guessing maybe the floats? because when i coast to a stop it idles fine then i can go again. Im gona call my dyno guy tomorow and see what he think.

The 400ex fuel petcock may not be large enough to support a 500 2-stroke..