Yamaha YZF-R125 Service Manual: Checking the crankshaft
1. Measure:
- Crankshaft runout
Out of specification
Replace
the crankshaft, bearing or both.
NOTE:
Turn the crankshaft slowly.
2. Measure:
- Big end side clearance
Out of specification
Replace
the crankshaft.
3. Measure:
- Crankshaft width
Out of specification
Replace the crankshaft.
3. Measure:
- Crankshaft width
Out of specification Replace the crankshaft.
4. Check:
- Crankshaft sprocket
Damage/wear
Replace the
crankshaft. - Bearing
Cracks/damage/wear
Replace the
crankshaft.
5. Check:
- Crankshaft journal
Scratches/wear
Replace the
crankshaft. - Crankshaft journal oil passage
Obstruction
Blow out with
compressed air.
Removing the crankshaft
1. Remove:
Crankshaft "1"
NOTE:
Remove the crankshaft with the crankcase
separating tool "2".
Make sure the crankcase separating tool is
centered over the crankshaft.
CAUTIO ...
Installing the crankshaft
1. Install:
Crankshaft "1"
NOTE:
Install the crankshaft with the crankshaft installer
pot "2", crankshaft installer bolt "3", adapter
(M12) "4" and spacer (crankshaft installer) "5".
...
Other materials:
Checking and charging the battery
WARNINGBatteries generate explosive hydrogen gas
and contain electrolyte which is made of poisonous
and highly caustic sulfuric acid.
Therefore, always follow these preventive
measures:
Wear protective eye gear when handling or
working near batteries.
Charge batt ...
Assembling the front brake caliper
WARNING
Before installation, all internal brake components
should be cleaned and lubricated
with clean or new brake fluid.
Never use solvents on internal brake components
as they will cause the brake caliper
dust seals and piston seals to swell and
distort.
...
Checking the horn
1. Check:
Horn resistance
Out of specification Replace.
a. Disconnect the horn connectors from the
horn terminals.
b. Connect the pocket tester ( × 1) to the horn
terminals.
Positive tester probe
horn terminal "1"
Negative tester probe
horn terminal "2"
c. Measure t ...