Aligning The Middle Gear - Yamaha Vmax VMX17C 2009 Service Manual

TIP
• Tighten the middle driven pinion gear bearing
housing bolts carefully, one thread turn at a
time only. Push in the middle driven pinion gear
bearing housing and then tighten the bolts to
specification.
• Clearance between the crankcase and the
middle driven pinion gear bearing housing
should be approximately 2 mm (0.08 in), when
measured with a thickness gauge "1".
1
4. Hold the middle drive pinion gear.
5. Turn:
• Universal joint yoke
TIP
While carefully tightening the middle driven pin-
ion gear bearing housing bolts in stages and in a
crisscross pattern, turn the universal joint yoke
back and forth until the dial gauge reads 0.05–
0.10 mm (0.002–0.004 in).
6. Measure:
• Crankcase-to-middle-driven-pinion gear-
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 are only available in 0.05 mm incre-
ments, therefore round off to the hundredth's
digit of the calculated thickness and select
the appropriate shim with the following chart.
1
M MMM M M MMM M MMM
5-114
b. For example, the clearance between the
crankcase and the middle driven pinion gear
bearing housing is 0.46 mm. Therefore, the
chart instructs you to round off the 6 to 5.
Thus, you should use one 0.15 mm and one
0.30 mm shim.
Hundredth
0, 1, 2
3, 4, 5, 6, 7
8, 9
Shims are supplied in the following thickness-
es.
Middle driven 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 pinion gear bearing housing
bolts
9. Install:
• Middle driven pinion gear shim(s)
10.Tighten:
• Middle driven pinion gear bearing housing
bolts
Middle driven pinion gear bearing
housing bolt
30 Nm (3.0 m·kgf, 22 ft·lbf)
LOCTITE®
11.Measure:
• Middle gear backlash
Out of specification → Refer to "MEASUR-
ING THE MIDDLE GEAR BACKLASH" on
page 5-113.
EAS25930

ALIGNING THE MIDDLE GEAR

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