Aligning The Middle Gear - Yamaha FJR13AY 2009 Service Manual

• After tightening the middle driven shaft bearing
housing bolts, loosen them until the clearance
between the crankcase and the housing is ap-
proximately 2 mm (0.08 in), when measured
with a thickness gauge "1".
4. Hold the middle drive shaft.
5. Turn:
• Middle driven shaft
TIP
While carefully tightening the middle driven shaft
bearing housing bolts in stages and in a criss-
cross pattern, turn the middle driven shaft back
and forth until the dial gauge reads 0.10–0.20
mm (0.0039–0.0079 in).
6. Measure:
• Crankcase-to-middle-driven-shaft-bearing-
housing clearance
(with a thickness gauge)
7. Select:
• Middle driven pinion gear shim(s) "1"
M MMM M MMM M M MMM M M MMM M
a. Shims can only be selected in 0.05 mm incre-
ments, therefore round off to the hundredth's
digit of the calculated thickness and select
the appropriate shims with the following
chart.
b. For example, the clearance between the
crankcase and the middle driven shaft bear-
ing housing is 0.42 mm. Therefore, the chart
instructs you to round off the 2 to 0. Thus, you
should use one 0.40 mm shim.
M MMM M M MMM M MMM
5-98
Hundredth
0, 1, 2
3, 4, 5, 6, 7
8, 9
Shims are supplied in the following thickness-
es.
Middle driven pinion gear shim
Thickness (mm)
0.10 0.15 0.20 0.30 0.40 0.50
L LLL L LLL L L LLL L L LLL L
8. Loosen:
• Middle driven shaft bearing housing bolts
9. Install:
• Middle driven pinion gear shim(s)
10.Tighten:
• Middle driven shaft bearing housing bolts
Middle driven shaft bearing hous-
ing bolt
25 Nm (2.5 m·kg, 18 ft·lb)
®
LOCTITE
11.Measure:
• Middle gear backlash
Out of specification → Refer to "MEASUR-
ING THE MIDDLE GEAR BACKLASH" on
page 5-97.
EAS25930

ALIGNING THE MIDDLE GEAR

TIP
Aligning the middle gear is necessary when any
of the following parts are replaced:
• Crankcase
• Middle drive shaft
• Middle driven shaft bearing housing
1. Select:
• Middle drive pinion gear shim(s) "1"
• Middle driven pinion gear shim(s) "2"
TIP
Select the middle driven gear shim(s) "2" by cal-
culating the middle drive gear shim thickness
and then measuring the middle gear backlash.
MIDDLE GEAR
Rounded value
0
5
10
L LLL L L LLL L LLL