Yamaha YFM45FAR, Service Manual

Page: 225 / 405

4 - 87
ENG
MIDDLE GEAR
●
Install the bearing
1
onto the yoke.
CAUTION:
Check each bearing. The needles can
easily fall out of their races. Slide the yoke
back and forth on the bearings; the yoke
will not go all the way onto a bearing if a
needle is out of place.
●
Press each bearing into the U-joint using a
suitable socket.
NOTE:
The bearing must be inserted far enough into
the U-joint so that the circlip can be installed.
●
Install the circlips
2
into the groove of each
bearing.
*****************************************************
INSTALLING THE MIDDLE DRIVE SHAFT
1.Tighten:
●
Nut (middle drive pinion gear)
1
NOTE:
Secure the middle drive shaft in the vise with a
clean rag.
2.Lock the threads with a drift punch.
New
T
R
.
.
130 Nm (13.0 m • kg, 94 ft • lb)
MEASURING THE MIDDLE GEAR
BACKLASH
1.Measure:
●
Gear lash
*****************************************************
Measurement steps:
●
Temporarily install the right crankcase.
●
Wrap a rag
2
around a screwdriver
3
, and
then insert it into the installation hole
1
of
the left crankcase speed sensor to hold the
middle driven gear.
Middle gear lash:
0.1 ~ 0.3 mm (0.004 ~ 0.012 in)