Before anyone goes any further, I'd like to say that it's actually very pleasant and refreshing to see people discussing the subject and not getting nasty - top dollar !

I knew that the octane rating did not effect the burn rate but I'm not exactly an expert or able to discuss it much.

I can tell you that higher compression and some ignition advance is a good way to releasing more power from many 2 stroke engines. I run a highly tuned Yam twin that, with it's full compressing head, will not run anything except avgas or shell optimax if avgas is not available. It's peak power is at 11750rpm so although the thing about avgas not being for low revving engines may be true in certain applications ie - the fact is true, in reality the bike thrives on it / needs it to run without lunching itself.

Suck, squeeze, bang - blow..... sounds like a cheap whore !
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