Yamaha BEARTRACKER YFM250XC, Service Manual

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DRIV
FINAL DRIVE GEAR AND DRIVE SHAFT
4.Inspect:
●
Final gear case 1
●
Bearing housing 2 (ring gear)
Cracks/Damage
→
Replace.
NOTE:
When the final gear case and/or ring gear
bearing housing are replaced, be sure to
adjust the shim of the final drive pinion
gear and/or ring gear, refer to the “FINAL
DRIVE GEAR AND RING GEAR SHIM
SELECTION” section.
FINAL DRIVE PINION GEAR AND RING
GEAR SHIM SELECTION
When the final drive pinion gear, ring gear,
final gear case and/or ring gear bearing
housing are replaced, be sure to adjust the
positions for the final drive pinion gear and
ring gear by the shim(s).
Final drive pinion gear shim(s) selection
1.Select:
●
Final drive pinion gear shim(s) 1
*********************************
Shim selection steps:
●
To find final drive pinion gear shim thick-
ness “A”, use the following formula.
a
= The stamped number on the final drive
pinion gear is either added to or sub-
tracted from “79”.
b
= The stamped number on the final gear
case is either added to or subtracted
from “78”.
NOTE:
All stamped numbers are in hundredths of
a mm.
Final drive pinion gear shim thickness:
“A” =
a
–
b
6