Selecting The Crankshaft Shim - Yamaha EH63 Service Manual

PISTONS, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
1
2
2
3
1
4
5
a
6
b
7
2
8
9
10
1
2
1
2
5
3
4
7.
Install:
• Connecting rod cap #2 "1"
• Connecting rod cap bolts #2 "2"
Connecting rod cap bolt:
25 N·m (2.5 kgf·m, 18 lb·ft)
TIP
• Make sure that the " " mark "a" on the connecting rod is
aligned with the " " mark "b" on the connecting rod cap.
• Tighten the connecting rod cap bolts alternately two to
three times.
8.
Install:
• Camshaft
(Refer to "INSTALLING THE VALVE LIFTERS AND
CAMSHAFT" on page 3-53.)
• Crankcase cover
(Refer to "INSTALLING
COVER" on page 3-54.)

SELECTING THE CRANKSHAFT SHIM

1.
Calculate:
• Pre-adjustment clearance "X"
Calculation and adjustment procedure:
a. Measure dimensions 1 and 2.
b. Measure the value of the "A" part of the crank-
case cover "1".
c. Measure the value of the "B" part of the crank-
shaft sprocket "3" and the crankcase "4".
d. Calculate the pre-adjustment clearance "X".
Pre-adjustment clearance "X" = (value of "A" +
value when gasket "5" is tightened (0.48 mm))–
value of the "B" (dimension 1–dimension 2)
e. Calculate the clearance value after adjustment.
Pre-adjustment clearance "X"–Adjustment shim
"2" thickness = Clearance after adjustment
f. Install or remove an adjustment shim "2" of the
proper thickness.
g. Install the crankcase cover "1".
3-62
THE CRANKCASE