Yamaha YZ-Serie Fahrer- Und Wartungshandbuch Seite 236

CYLINDER HEAD, CYLINDER AND PISTON
5PA40540
5PA40550
5PA40560
2. Measure:
Piston pin outside diameter
G
Use micrometer 1.
Out of limit → Replace.
Piston pin outside diameter:
13.996 ~ 14.000 mm
(0.5510 ~ 0.5512 in)
<Limit>: 13.975 mm (0.5502 in)
3. Check:
Free play (when the piston pin 1 is in
G
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
G
Piston pin
G
Into the small end of connecting rod.
5. Check:
Free play
G
There should be no noticeable free play.
Free play exists/unsmooth revolution →
Inspect the connecting rod for wear/replace
the pin and/or connecting rod as required.
4 - 20
ENG