Removing The Piston; Checking The Timing Chain Guide; Checking The Cylinder And Piston - Yamaha Rhino 450 YXR45FAV Service Manual

CYLINDER AND PISTON

REMOVING THE PISTON

1. Remove:
• piston pin clips 1
• piston pin 2
• piston 3
NOTE:
• Before removing the piston pin, deburr the
clip groove and pin hole area. If the piston
pin groove is deburred and the piston pin is
still difficult to remove, use the piston pin
puller 4.
• Before removing the piston pin clip, cover the
crankcase with a clean rag to prevent the
piston pin clip from falling into the crankcase.
Piston pin puller
P/N. YU-01304, 90890-01304
CAUTION:
Do not use a hammer to drive the piston
pin out.
2. Remove:
• piston rings
NOTE:
Spread the end gaps apart while at the same
time lifting the piston ring over the top of the
piston crown.

CHECKING THE TIMING CHAIN GUIDE

1. Check:
• timing chain guide (exhaust)
Wear/damage → Replace.

CHECKING THE CYLINDER AND PISTON

1. Check:
• cylinder and piston walls
Vertical scratches → Rebore or replace the
cylinder and the piston.
• cylinder water jacket
Mineral deposits/rust → Eliminate.
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ENG