[Cam mod] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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Cam mod
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Posted by: raceready12

Does anyone know which way you turn the exhaust cam to do the cam mod?

Posted by: TGA400EX

1 tooth clockwise

Posted by: Rider-trx_250ex

What is this cam mod?

Posted by: ohsobad_chevy

quote:
Originally posted by Rider-trx_250ex
What is this cam mod?

It is actually setting up the timing to the YZF 450 (dirt bike) specs. What you are doing is retarding the exhaust cam 1 tooth (clockwise)

search for cam mod, you will find a bunch of literature. I highly recommend that you do this mod, too.

Posted by: Ryan

quote:
Originally posted by ohsobad_chevy
It is actually setting up the timing to the YZF 450 (dirt bike) specs. What you are doing is retarding the exhaust cam 1 tooth (clockwise)

search for cam mod, you will find a bunch of literature. I highly recommend that you do this mod, too.

Does this really make a big difference? And how does this make the engine perform, comparing to stock?

Posted by: Pono

it is amazing. the power just never falls. it just keeps revving hard.

Posted by: ohsobad_chevy

quote:
Originally posted by Pono
it is amazing. the power just never falls. it just keeps revving hard.

I felt that extra bit on the mid to top end, but I also did not loose any on the bottom. There is nothing to lose by doing this mod.

Posted by: #17YFZRACER

like they said, it feels like it never stops pulling...HARD. it will definitely make your eyes big and your butt pucker

Posted by: yfzrider310

will this make the bike run richer or more lean?

Posted by: Pono

quote:
Originally posted by #17YFZRACER
like they said, it feels like it never stops pulling...HARD. it will definitely make your eyes big and your butt pucker

i agree....especially if you have stock suspension......it just cant seem to catch up with the speed.

Posted by: ohsobad_chevy

quote:
Originally posted by yfzrider310
will this make the bike run richer or more lean?

Typically, most dont have to rejet after completing the cam mod, but if it were to go one way, it would create a leaner condition. I would say bump your main up one size, just for safety.