Hi everybody. New here. Used to ride a Aprilia 450RXv, down-graded to a DRZ 400 and now also have a 2007 Ninja 650R. Just searching out the 'clunky' gearbox issue. The bike shifts better when it's spooled up so shifting at higher RPMs is a must. But driving around town can get really annoying. I'm wondering whether oil weight has anything to do with it. A heavier oil might stick to the gears a little better and absorb some of the clunk. Or would a lighter oil flow better onto the gears once the clutch is pulled. Any thoughts?