Power Unit System; Shimless Valve Lifter - Yamaha F150A Service Manual

Power unit system

Shimless valve lifter

Newly designed valve lifters "1" have been adopted in place of the valve shims previously used "2".
The valve lifters are available in different thicknesses "a". Therefore, the valve clearance "b" can be
adjusted by replacing the current valve lifter with a new valve lifter of the appropriate thickness.
A
A. Previous L4 model
B. New L4 model
2
a
2-12
Power unit system
B
0
1
b
2
3
1
4
5
6
7
8
9
10
A