Join Date: Nov 2009
Location: Lander, Wyoming
IMO, new piston & rings would triple its life expectancy. How much did the useable cylinder head cost?
Did you happen to notice the size of the tiny oil port in the cylinder head oil pipe banjo bolt? A single 1/16th inch hole! The oil inlet near the exhaust pipe is also the same Tiny Single 1/16th inch hole.
I'll suggest that you should drill the Inlet by the exhaust pipe to 2, 1/8" holes as well as the cam shaft feed 2, 1/8" holes. Drill the LH transmission feed to a single 1/8" hole.
This may slightly reduce some excess oiling of the cylinder wall & piston rings which can be partial cause of excessive oil consumption.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting