What pistons are you guys running in your RM250’s?

xr70
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xr70
When I purchased my 06, it had fresh Wiseco single ring race piston in it. The part number on that piston shows it is a Yamaha YZ 250 piston. I heard that people run the yami piston in it - some more intel on that would be appreciated. The guy gave me a brand new Vertex piston with it also, which is a double ring, and is the RM 250 piston. I am kind of sketched out to run it with a yami piston in it. I am thinking to replace it with the Vertex piston. What do you guys think?
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Gary105
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Gary105 1/13/2019 12:01pm
1/13/2019 12:01pm
Yup that's what is mine. One of Digger29 old bikes built by Ron Bushy. John Dowds old factory mechanic. Thing rips!!! Major engine work done to it though.
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mister2dt
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Canton, MS US
mister2dt 1/13/2019 12:19pm
1/13/2019 12:19pm
Pretty much indentical engines, based off the YZ. Run the YZ pistons, I have in all of my RM’s, most everyone i know run YZ pistons, better overall performance vs. the RM piston.
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Turbojez
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Turbojez 1/13/2019 1:48pm
1/13/2019 1:48pm
I run Wossner single ring in mine, works awesome.

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lucas51
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lucas51 1/13/2019 2:21pm
1/13/2019 2:21pm
Wiseco racer elite here. It's also a single ring. About 20hrs on it no issues, runs great.
Digger29
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Digger29 1/13/2019 2:31pm
1/13/2019 2:31pm
Run the Wiesco Racers Choice 808 YZ250 piston in the RM250. The bike won't even sound the same with it. You'll thank me later :-)
dmm698
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dmm698 1/13/2019 4:11pm
1/13/2019 4:11pm
Digger29 wrote:
Run the Wiesco Racers Choice 808 YZ250 piston in the RM250. The bike won't even sound the same with it. You'll thank me later :-)
Wiseco is still making the racers choice piston however no more TiNi rings for it. Still a good piston and yes, run the YZ piston in the RM as noted.
xr70
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xr70 1/13/2019 5:42pm
1/13/2019 5:42pm
? , thanks guys.

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