I have been running 50/50 (93 and 110) in my 12/1 686. I figure this averages out to about 101 octane. The guys at je pistons say about 100 octance is right for this compression. I know to much octance can hurt power and too little can damage the motor. Je says its a bad idea to mix different fuels but i cant find anything closer then 110. I found a low lead 100 av-gas but im afraid to run it. Any thoughts would be helpfull.

 

I use VP red and it worked the best,octane rating of 105,a 100 octane is pushing it if your running the bike hard..

 

where or what type of place can i find vp red?

 

Any one else?????

 

i run either a mix of 110 and 92 or straight 110 and mine has ran great for 2 years

 

I use 76 100 octane from the pump. Somtimes I'll mix it 50/50 with 91 octane to get me around 95-96 octane. Mines only 11:1 though with a mild cam. It runs it's best when I mix. It's a tad slower feeling when on 100 strait.

 

where can i buy these different types of fuel?

 

I'm going to experiment with straight 93 octane, and 93/race mix on my Ross 11:1.

 

You can order some fuel from VP. I think it either comes in a 5 gallon bucket or a 55 gallon drum. Try their web site or maybe your local yellow pages for a supplier.VP racing fuel

 

I think it list distributors on the link ward gave also, try calling one near you. You could call around to cycle shops also.