what octane?

It seems WOOT has it backwards, higher octane would tend to retard the completion of the burn, which should complete during the "quench" when the piston dwells at TDC ; the piston actually stops !
My 750 Seca says 91 Leaded also, but I run 87 with no problems.

And it's Research method + Motor method over 2 R + M / 2
What they don't tell you is that these methods are both on controlled, experimental motors in lab conditions under ridiculous conditions.

Expect more ethanol in the future. . a knocking motor is a dying motor

 

im not to sure about all the tech stuff it does seem a lot of our side covers say 91 octane and leaded gas, i know when i use to run my car at the drags the higher the octane the better she did hell we even put jp4 for dragging on not much of a modified 350. Big Difference! our regular gas here is 85 octane, i havent got my bike road legal yet but here in a few weeks i,ll probably be running regular gas with a octane boost and some lead substitute, i,ll let you know if i blow her up or not

 

it dont matter to me it all burns 87 89 91 jet fuel it all burns.......except the jet fuel havent tried it...YET.
but i spend the extra cents and get the 91 unless im broke

 

3.35 $ / gal octane... soon there won't be any change from a 20$

 

Hmm, I remember when mid grade was introduced back in the 80's. A lot of people who were burning regular gas suddenly began to have knocking problems. A national consumer affairs tv show did a report on it, and it turns out, there was no new mid-grade gas. The oil companies simply came out with a crappier grade of gas, called it regular, and renamed the old regular, mid grade.