From 81 to 87 I owned a KDX250......from 87 to 03 I owned a KDX 200.....since 03 I 've owned a KDX 220R and ever since the first day I've used Golden Spectro at 64/1 with NEVER a piston/cylinder/crank failure. After reading all the pre-mix threads I could find I thought maybe I should change the ratio (40/1). All I got was more smoke and splooge. I think the key to this is right on the label of the Spectro bottle. "Concentrated" . Ya just don't need to use as much Spectro as the other stuff. Back to 64/1.
Cheers
RS
Cheers
RS