Checking The Camshaft Sprocket; Checking The Decompression System; Checking The Timing Chain Guide (Exhaust Side); Checking The Timing Chain Tensioner - Yamaha 2004 Rhino 660 YXR660FAS Service Manual

CAMSHAFT AND CYLINDER HEAD
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CHECKING THE CAMSHAFT SPROCKET

1. Check:
• camshaft sprocket
Wear/damage → Replace the camshaft
sprocket and timing chain as a set.
a 1/4 of a tooth
b Correct
1 Timing chain
2 Sprocket
CHECKING THE DECOMPRESSION
SYSTEM
1. Check:
• decompression system
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Check while the camshaft sprocket is installed
on the camshaft.
a. Check that the decompressor lever pin 1
projects from the camshaft.
b. Check that the decompressor cam 2
moves smoothly.
L LLL L LLL L L LLL L L LLL L
CHECKING THE TIMING CHAIN GUIDE
(EXHAUST SIDE)
1. Check:
• timing chain guide (exhaust side)
Wear/damage → Replace.
CHECKING THE TIMING CHAIN
TENSIONER
1. Check:
• timing chain tensioner
Cracks/damage/rough movement →
Replace.
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a. Lightly press the timing chain tensioner rod
into the timing chain tensioner housing by
hand.
NOTE:
While pressing the timing chain tensioner rod,
wind it clockwise with a thin screwdriver 1
until it stops.
ENG
M MMM M M MMM M MMM
L LLL L L LLL L LLL
M MMM M M MMM M MMM