[randyb12]

what is stock compression for a 88 wr 650?

I did a compression test and am surprised at the numbers... 180psi on 1 and 188psi on 2. These were measured with the engine cold.
Also can I run 91 octane in this engine? Thats the best we get here in Cali...

 

[GCwaverunner]

that compressions correct. 91's fine.

 

[randyb12]

Thanks!