Join Date: Nov 2009
Location: Lander, Wyoming
I'll suggest that the less porous/finer foam filters like the OEM KLR650 air filter may actually work better with SAE 10W40 or SAE 40 (my preference) than with thicker/stickier Bel-Ray, Uni, PJ-1, Twin Air oils which do work great on the more porous foam filters like Uni-Filter, Twin Air and such.
The 'creep' of common engine oil and attracted dust which Daniel doesn't like is actually easier to wipe out of the air box, because it is still oilier.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting