Yamaha YZ125(D) Owner's Service Manual page 104

Standard
Runout 0.03 mm
limit: (0.0012 in)
Small 0.8–1.0 mm
end free (0.031–
play: 0.039 in)
Side 0.06–0.64
clear- mm (0.002–
ance: 0.025 in)
55.90–55.95
Crack
mm (2.201–
width:
2.203 in)
INSTALLING THE CRANKCASE
BEARING
1. Install:
• Bearing "1"
To left and right crankcase.
Install the bearing by pressing its out-
er race parallel.
INSTALLING THE OIL SEAL
1. Install:
• Oil seal (left) "1"
• Oil seal (right) "2"
• Apply the lithium soap base grease
on the oil seal lip.
• Install the oil seal with its manufac-
ture's marks or numbers facing out-
ward.
<Limit>
0.05 mm
(0.002 in)
2.0 mm
(0.08 in)
INSTALLING THE CRANKSHAFT
1. Install:
—
• Crankshaft "1"
Use the crankshaft installing tools
"2", "3", "4".
—
• Hold the connecting rod at top dead
center with one hand while turning
the nut of the installing tool with the
other. Operate the installing tool un-
til the crankshaft bottoms against
the bearing.
• Before installing the crankshaft,
clean the contacting surface of
crankcase.
• Apply molybdenum disulfide grease
to the surface "a" where the crank-
shaft and bearing come in contact.
• Apply the lithium soap base grease
on the oil seal lip.
Do not use a hammer to drive in
the crankshaft.
A. For USA and CDN
B. Except for USA and CDN
CRANKCASE AND CRANKSHAFT
Crankshaft installing pot
"2":
YU-90050/90890-01274
Crankshaft installing bolt
"3":
YU-90050/90890-01275
Adapter "4":
YU-90063/90890-01278
4-42
2. Check:
• Shifter operation
• Transmission operation
Unsmooth operation → Repair.
3. Apply:
• Sealant
On the right crankcase "1".
Yamaha Bond No.1215
®
(ThreeBond No.1215):
90890-85505
Clean the contacting surface of left
and right crankcase before applying
the sealant.
4. Install:
• Dowel pin "1"
• O-ring "2"
5. Install:
• Right crankcase "1"
Use the crankshaft installing tool
"2", "3", "4".
Crankshaft installing pot
"2":
YU-90050/90890-01274
Crankshaft installing bolt
"3":
YU-90050/90890-01275
Adapter "4":
YM-01499/90890-01499