YZ piston in a RM??

pokemanyz · Sep 29, 2005

Somewhere I read that a YZ 250 piston can be used in a RM250 but I don't remember why someone would do that or what year works in what RM.

I have a 2004 RM 250 & I'm about to do a new top end so if anyone knows ???? :laugh:

Malinois · Sep 29, 2005

The piston is made by wiseco, check with them first. My 05 RM has the YZ single ring piston and YZ v-force.

02'Cr Rider · Sep 30, 2005

I heard something about the yz piston has a higher dome,it gives a little more compression.I could be wrong......

KDXman_88 · Oct 1, 2005

that is what dirtrider said in their set up article last year or something... they said all of the race teams are switching them out for the YZ piston so i am guessing it does somethign.

kimoajaj · Oct 1, 2005

Why use an YZ piston if you can get an RM piston ? :).

I`m just wondering..

Spine_Thrust · Oct 1, 2005

C'mon, everyone knows Yamaha has better quality parts... :)

bclapham · Oct 1, 2005

Spine_Thrust said:
C'mon, everyone knows Yamaha has better quality parts... :)

Its made by wiseco.

both the RM and YZ piston are made by the same company.

bedell99 · Oct 2, 2005

It was the single ring race piston with the electra coating made for the YZ. I remember MXA mentioning something about it.

Erik

pokemanyz · Oct 2, 2005

Hi Bruce!

bclapham said:
Its made by wiseco.

both the RM and YZ piston are made by the same company.

jmossbarger · Oct 4, 2005

808M06640 is the part number. RC used that setup for Supercross last year.

Good luck,
Joe

d36RM racer · Oct 4, 2005

I ran this setup in my 03 RM250 with a boysen rad valve and sst pipe and stock silencer. I gained some bottom end the power rolled on a little smother but I lost some top end. currently i have the suzuki piston made by wiesco in the bike but give the yz one a shot u might like it. actually it probally works well with the 05 and up rm's due to the fact they fixed the lack of top end power

YZ piston in a RM??

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