Yamaha TZ125M1 Owner's Service Manual page 110

CYLINDER HEAD, CYLINDER AND PISTON
2. Measure:
• Piston pin outside diameter
Use micrometer 1.
Out of limit ≥ Replace.
]
Piston pin outside diameter:
Standard
14.995~15.000 mm
(0.5904~0.5906 in)
3. Check:
• Free play (when the piston pin 1 is in place
in the piston 2)
There should be no noticeable for the play.
Free play exists ≥ Replace piston pin
and/or piston.
4. Install:
• Small end bearing
• Piston pin
Into the small end of connecting rod.
5. Check:
• Free play
There should be no noticeable free play.
Free play exists ≥ Inspect the connecting
rod for wear/Replace the pin and/or con-
necting rod as required.
4-22
ENG
Limit
14.975 mm
(0.5896 in)