Great info on fuel quality

[tripplec]

Ok, sound the same if you running lower octane than you need. Can't win...oh well

 

[horkn]

Ok, sound the same if you running lower octane than you need. Can't win...oh well

Keep in mind our 600 twins are ok to use much less than 87 octane due to the thich head gasket, now if you ahev removed a layer or 2 from the head gasket, you might not want to use less than 90 or so.

yami made these things very conservative.

 

[daman]

I wouldn't use anything lower then 87(and thats iffy) if i were you, i stick
with 89,,for one the owners manual calls for it and two even with the thick
H/G i have OVER 125 psi on my twins, a healthy twin will have good
comp. even with the thicker stock HG..

 

[A couple of bucks]

Bump for a good read.