Yamaha YZF-R125 Service Manual: Checking the front brake pads
The following procedure applies to all of the brake pads.
1. Operate the brake.
2. Check:
- Front brake pad
Wear indicator grooves "a" have almost disappeared
Replace the brake pads as a set.Refer to "FRONT BRAKE" on page 4-17.
Checking the brake fluid level
1. Stand the vehicle on a level surface.
NOTE:
Place the vehicle on a suitable stand.
Make sure the vehicle is upright.
2. Check:
Brake fluid level
Below the minimum level mark "a" → ...
Checking the rear brake pads
The following procedure applies to all of the
brake pads.
1. Operate the brake.
2. Check:
Rear brake pad
Wear indicator groove "a" has almost disappeared
Replace the brake pads as a set. ...
Other materials:
Checking the camshaft
1. Check:
Camshaft lobes
Blue discoloration/pitting/scratches
Replace
the camshaft.
2. Measure:
Camshaft lobe dimensions "a" and "b"
Out of specification Replace
the camshaft.
3. Check:
Camshaft oil passage
Obstruction Blow out with
compressed air. ...
Checking the primary driven gear
1. Check:
Primary driven gear "1"
Damage/wear Replace the
primary drive
gear and clutch housing as a set.
Excessive noise during operation
Replace
the primary drive gear and clutch housing as
a set.
...
Measuring the compression pressure
NOTE:
Insufficient compression pressure will result in a
loss of performance.
1. Measure:
Valve clearance
Out of specification →Adjust.
Refer to "ADJUSTING THE VALVE CLEARANCE"
on page 3-3.
2. Start the engine, warm it up for several minutes,
and then turn it off.
3. Remove:
...