Yamaha YZF-R125 Service Manual: Assembling the crankcase
1. Thoroughly clean all the gasket mating surfaces and crankcase mating surfaces.
2. Apply:
- Sealant
(onto the crankcase mating surfaces)
NOTE:
Do not allow any sealant to come into contact with the oil gallery.
3. Install:
- Right crankcase
NOTE:
Turn the shift drum segment "1" to the position shown in the illustration. In this position, the shift drum segment teeth will not contact the crankcase during crankcase installation.
4. Install:
- Crankcase bolts
NOTE:
Tighten each bolt 1/4 of a turn at a time, in stages and in the proper sequence as shown.
- M6 × 70 mm : "7-9", "11"
- M6 × 55 mm : "14", "15"
- M6 × 45 mm : "1-5", "10"
A. Left crankcase
B. Right crankcase
Installing the bearing retainer
1. Install:
Bearing retainer "1"
NOTE:
Install the bearing retainer "1" with its "OUT"
mark "a" facing outward.
Apply locking agent (LOCTITE) to the
threads of the bearing retainer bo ...
Crankshaft
...
Other materials:
Checking the valves and valve guides
The following procedure applies to all of the
valves and valve guides.
1. Measure:
Valve-stem-to-valve-guide clearance
Out of specification Replace the
valve
guide.
Valve-stem-to-valve-guide clearance =
Valve guide inside diameter "a" -
Valve stem diameter "b"
2. Replace:
...
Checking the clutch plates
The following procedure applies to all of the
clutch plates.
1. Check:
Clutch plate
Damage Replace the clutch
plates as a
set.
2. Measure:
Clutch plate warpage
(with a surface plate and thickness gauge "1")
Out of specification Replace
the clutch
plates as a set.
...
Storage
Short-term
Always store your motorcycle in a cool,
dry place and, if necessary, protect it
against dust with a porous cover.
NOTICE
Storing the motorcycle in a
poorly ventilated room or covering
it with a tarp, while it is still
wet, will allow water and humidity
to seep in and ...