Yamaha XVS650 - Middle Drive Gear Shim Selection

MIDDLE GEAR ENG
4-78
NOTE: _
Before tightening the bolts:
1.Adjust the gear lash
of the middle gear.
Refer to "GEAR BACKLASH ADJUST-
MENT
/I
•
2.Check the operation of the middle driven
gear.
MIDDLE DRIVE GEAR SHIM SELECTION
NOTE: _
Gear positioning is necessary when any of
the following parts are replaced.
• Crankcase assembly
• Middle gear assembly
1.Select:
• Middle drive gear
shim CD
**********************************
Middle drive gear shim selection steps:
• Position middle drive gear
by using shims
CD with their respective thickness calcu-
lated
from information marked on crank-
case, bearing housing and drive gear end.
CD Shim thickness II A"
.To find shim thickness itA" use following
formula:
Middle drive pinion gear shim thickness:
II A" =®- (6)
Where:
® = a numeral (usually a decimal num-
ber) on the middle drive pinion gear
is either added
to or subtracted from
II 44/'.
(6) ::;: a numeral (usually a decimal num-
ber) on the left crankcase specifies a
thickness
of "43.5".
Example:
1) If the middle drive pinion gear is
marked
II +03"
..... ® is 44.03
2) If the crankcase (left) is marked II 43.45"
.....
(6) is 43.45
3} Therefore, the shim thickness is 0.58 mm