skygazer6033
Elio Addict
I do a lot of research on technical aspects of the iav engine. I have read that the valve clearance is adjusted by the use of classed shims. This is a common practice on high performance motorcycles. However the innovative iav cylinder head utilizes a cam cover with integral cam bearings. This design would not allow access to check valve clearances or replace shims to make adjustments. As soon as the cover is removed for access the valve springs will kick the cam up and make it impossible to check the clearance. Iav seemed to be really proud of their design in that it cuts down on the number of individual parts allows use of a smaller oil pump etc. It is my contention that if your going to cut corners the head and valve train is not the place to do it (nor is the crankcase and bottom end for that matter).