When I got the bike it had been an oil burner and Kawasaki had bored it .5mm over in an attempt to fix the oil burning. That lasted a few thousand miles before it started burning a quart in a thousand. Before it got much worse I installed a Wossner high compression piston that brought the displacement to 678cc.
There is a kickstart installed, so the clutch is from a KLR600 with a KLR600 primary gear ratio.
The exhaust is based upon an early GSXR750; free-flowing, light, yet fairly quiet. The airbox has the usual mods, plus mods to the airbox door. The head is ported with big valves, the carburetor is set up with a KLX needle. In the head are adjustable cam sprockets with the valve timing moved slightly to bring the power peak up a bit in the RPM range.
The oiling system has received all of Paul Westman's mods. With the Wossner piston there is no oil burning issue so the main effect of the mods is to provide a bit more pressure to the cams and the transmission. That's not a bad thing because most of the lube for the upper balancer bearing comes off the transmission. Since I lost the '08 to an upper balancer bearing, I appreciate the extra oil going up that way.