YZ piston in a RM??

[pokemanyz]

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]

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]

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

 

[KDXman_88]

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]

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

I`m just wondering..

 

[Spine_Thrust]

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

 

[bclapham]

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]

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

Erik

 

[pokemanyz]

Hi Bruce!

Its made by wiseco.

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

 

[jmossbarger]

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

Good luck,
Joe

 

[d36RM racer]

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