Registered Forum User
Big Twin
Posts: 1,589
Join Date: Jul 2003
Location: nottingham
Mood: #65 Double Desmo Due Champion - Class B 2007, Class A 2009
Yeh, used avgas on a KX250, but mainly to help the pistons, as it has loads of lead in it.
I do use Optimax on the 900ss as much as possible, but it doesnt make any difference to the R1.
Andy