Yamaha YZF-R125 Service Manual: Removing the piston
1. Remove:
-
Piston pin clips "1"
-
Piston pin "2"
-
Piston "3"
| CAUTION: Do not use a hammer to drive the piston pin out. |
NOTE:
-
Before removing the piston pin clip, cover the crankcase opening with a clean rag to prevent the piston pin clip from falling into the crankcase.
-
Before removing the piston pin, deburr the piston pin clip groove and the piston pin bore area.
If both areas are deburred and the piston pin is still difficult to remove, remove it with the piston pin puller set "4".
2. Remove:
-
Top ring
-
2nd ring
-
Oil ring
NOTE:
When removing a piston ring, open the end gap with your fingers and lift the other side of the ring over the piston crown.
Checking the cylinder and piston
1. Check:
Piston wall
Cylinder wall
Vertical scratches Replace the
cylinder,
and replace the piston and piston rings as a
set.
2. Measure:
Piston-to-cylinder clearance
a. Mea ...
Other materials:
Replacing an auxiliary light bulb
This model is equipped with two auxiliary
lights. If an auxiliary light bulb burns
out, replace it as follows.
Remove the socket (together with
the bulb) by pulling it out.
Auxiliary light bulb
Remove the burnt out bulb by pulling
it out.
Insert a new bulb into t ...
Setting the diagnostic mode
1. Set the main switch to "OFF" and the engine stop switch to "
".
2. Disconnect the self-diagnosis signal connector "1", and then connect the FI
diagnostic tool "2" as
shown.
3. Disconnect the fuel pump coupler.
4. While pressing the "MODE" button, set the main switch to "ON".
NOTE:
...
Assembling the oil pump
1. Lubricate:
Oil pump inner rotor
Oil pump outer rotor
Oil pump driven gear
(with the recommended lubricant)
2. Install:
Oil pump outer rotor
Oil pump inner rotor "1"
Oil pump driven gear
Pin "2"
NOTE:
When installing the inner rotor, align the pin "2"
in the oil pump sh ...