Castor 927 oil

[Blue_Dog]

Would like to know what the plug readings look like after the blends you guys are talking about? Starting at 93 oct and going up. I know they got to be hot.
B_D

 

[Dwight Rudder]

Frenfroe, Your bikes require 95 research octane.
US gas is Research + Motor octane / 2 = Pump octane.  93 octane is plenty here in USA. If you have doubts mix 1 gal of race or AVgas to 4 gallons of Mogas 93 oct.
Cher'o,
Dwight

Dwight Rudder
7 time ISDT / E medalist
7 time National Enduro Class Champion.