ESR 310 O-rings

[MossboysRacing]

Im freshining (sp) up the top end and i was wondering if you have to buy new o-rings from Esr, or is there another company? Im sponsored by a honda dealer, so i try and get everything i can from them. They deal a lot with pro-x, but i dont know if they are the same? Any help would be great

[Grande Huevos]

i had a pro x cylinder for my 310 by CT racing and when i rebuilt it i could not find them anywhere other then from CT and called tons of places

[Aceman]

I buy my top end parts from LA sleeve, since it's their Pro-X cylinder on my R. I can't remember if they'd sell me just the o-rings though...

Seemed like someone on this forum asked this question before and somebody knew an alternative o-ring that worked, maybe it'd come up in a search.

[jon370r]

The Niks 310 cylinder O-rings are from early 90's YZ250. Go to a Yamaha shop and ask for 1992 YZ250 head gasket o-rings for about $8.

[Langbolt]

X2

Jon370R is right!

I ran Yz250 O-rings in my 310 and never had an issue.

:devil:

[MossboysRacing]

I thought i remembered seeing that somewhere in an old post, i searched and sorted through a bunch of threads with no luck. I guess i should of said, im sponsored by a honda/yamaha dealer, so this should be easy for me. I'll get them sometime next week and will double check that they fit the new style esr cylinders. Im sure if they fit the old pro-x, then they will fit these. Thanks a bunch