Checking The Timing Chain And Camshaft Sprocket; Checking The Timing Chain Guides; Checking The Timing Chain Tensioner - Yamaha MTN1000 2016 Service Manual

ting/scratches  Replace or check the lubri-
cation system.
3. Measure:
• Rocker arm inside diameter "a"
Out of specification  Replace.
Rocker arm inside diameter
7.987–8.002 mm (0.3144–0.3150
in)
Limit
8.017 mm (0.3156 in)
a
4. Measure:
• Rocker arm shaft outside diameter "a"
Out of specification  Replace.
Rocker arm shaft outside diame-
ter
7.967–7.979 mm (0.3137–0.3141
in)
Limit
7.936 mm (0.3124 in)
EAS30258
CHECKING THE TIMING CHAIN AND
CAMSHAFT SPROCKET
1. Check:
• Timing chain
Damage/stiffness  Replace the timing
chain and camshaft and camshaft sprocket
as a set.
2. Check:
• Camshaft sprocket
More than 1/4 tooth wear "a"  Replace the
camshaft sprockets and the timing chain as a
set.
a. 1/4 tooth
b. Correct
1. Timing chain
2. Camshaft sprocket
EAS30265

CHECKING THE TIMING CHAIN GUIDES

The following procedure applies to all of the
camshaft sprockets and timing chain guides.
1. Check:
• Timing chain guide (exhaust side) "1"
• Timing chain guide (intake side) "2"
• Timing chain guide (top side) "3"
Damage/wear  Replace the defective
part(s).
a
EAS30266

CHECKING THE TIMING CHAIN TENSIONER

1. Check:
• Timing chain tensioner
Cracks/damage/rough movement  Re-
place.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Using the valve spring compressor "1", push
and insert timing chain tensioner rod "2" into
the timing chain tensioner housing.
TIP
Push the timing chain tensioner rod in direction
"a", and turn the timing chain tensioner body "3"
in direction "b" until it stops.
5-16
CAMSHAFTS
3
2
1