compression to octane ratio

[TURBO400]

what is the highest compression piston i could use using super 93octane?

[eganracing]

u could probaly get away with 12:1. but i would recommend 11:1

[cals400ex]

the bike you have and the cam you run will also play a factor.

[bwamos]

Being very very general.

Air Cooled = 11:1
Water Cooled = 12:1

But as above said, it varies slightly between models and mods.

[UglyMotha™]

heck it will even depend on how fat or lean u run it just one to many factors

[Rico]

You should also ask what type of pipe you should run??

We are talking about a lawmower right???