Yamaha MX360 - Valve Lapping

VALVE
3-42
1
2
3
4
5
6
7
8
9
10
ENGINE
VALVE LAPPING
1.
Apply a coarse lapping compound evenly on the valve
face. Lap the valve by tapping and rotating the valve
lapper “1” clockwise and counterclockwise.
2.
Clean off all of the lapping compound from the valve
face and valve seat. Apply fine lapping compound on
the valve face and lap the valve as described in step
1.
3.
Once the contacting surface of the valve face is pol-
ished and becomes shiny, apply mechanic’s blue lay-
out fluid to make sure that there are traces of even
contact in the center of the valve face.
TIP
After every lapping procedure, clean off the compound
from the valve face and valve seat.
1
Do not let the lapping compound enter the gap
between the valve stem and the valve guide.
NOTICE