Aligning The Middle Gear - Yamaha BT1100 2002 Service Manual

MIDDLE GEAR
EAS00452

ALIGNING THE MIDDLE GEAR

NOTE:
Aligning the middle gear is necessary when any
of the following parts are replaced:
• Crankcase
• Middle drive shaft
1. Select:
• middle drive gear shim(-s) 1
NOTE:
Select the middle drive gear shim(-s) 1 by calcu-
lating the middle drive gear shim thickness and
then measuring the middle gear backlash.
a. Position the middle drive gear with the appro-
priate shim(-s) 1 that has had its respective
thickness calculated from information marked
on the crankcase and the end of the middle
drive gear.
b. To find middle drive gear shim thickness "A",
use the following formula.
Middle drive gear shim thickness
"A"= a – c
a = "43,00"
b = a numeral on the upper crankcase near the
main bearing selection numbers and which is added
to the nominal size "42"
Example:
a is 43.00
If the upper crankcase is marked "46" b
c is 42.46 (i.e., 42.00 + 0.46 = 42.46)
"A" = 43.00 – 42.46 = 0.54
Round off to the hundredths digit and select the
appropriate shim(-s).
NOTE:
In the above example, the calculated number is
0.54. The chart instructs you to round off the 4 to
5. Thus, the shim thickness is 0.55 mm.
4-81
ENG