You are definately running too much octane. Pump premium 91-92 octance is all you should need.

 

Not sure on the pump gas. Where did you get that JE Piston man..... You may want to check and verify that you are really at 11.5-1 compression and not 12 or 13ish...

 

Well if he truly is 11.5:1 there should be no need to run race gas, but yes he should check what his true compression is. I recall hearing some of the earlier JE pistons were higher than advertised. At a minimum I would try going 50:50 mix and see if it runs any better.

 

<div class="FTQUOTE"><begin quote>Originally posted by: DSengineer

Well if he truly is 11.5:1 there should be no need to run race gas, but yes he should check what his true compression is. I recall hearing some of the earlier JE pistons were higher than advertised. At a minimum I would try going 50:50 mix and see if it runs any better.</end quote></div>

I can agree with that. I know Scott was having some problems with one he picked up a few months back, due to it being a higher compression so that was my basis.

So yep, back off on the Octane and see what that does for ya. You will most likely be jetting up for the lower Octane. More fuel=more power!!!

 

DONT RUN PUMP GAS WITH 11.5 JE PISTON IF YOU DO = BIG MESS IN MOTOR

i found that out the hard way, it was acutally 12-13 compression and i blew my bike to ****.