Yamaha YZ85( P) /LC, Owner'S Service Manual

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ENG
EC473000
REMOVAL POINTS
Piston and piston ring
1. Remove:
●
Piston pin clip
1
NOTE:
Before removing piston pin clip, cover the
crankcase with a clean rag to prevent piston
pin clip from falling into the crankcase cavity.
5PA40410
2. Remove:
●
Piston pin
1
●
Piston
2
●
Small end bearing
3
NOTE:
Before removing the piston pin, deburr the clip
groove and pin hole area. If the piston pin
groove is deburred and piston pin is still diffi-
cult to remove, use the piston pin puller set
4
.
CAUTION:
Do not use a hammer to drive the piston
pin out.
Piston pin puller set:
YU-1304/90890-01304
5PA40420
3. Remove:
●
Piston ring
1
NOTE:
Take care not to scratch the piston and dam-
age the piston ring.
5PA40430
INSPECTION
Cylinder head
1. Eliminate:
●
Carbon deposits
Use a rounded scraper
1
.
NOTE:
Take care to avoid damaging the spark plug
threads. Do not use a sharp instrument. Avoid
scratching the aluminum.
5PA40440
CYLINDER HEAD, CYLINDER AND PISTON