Checking The Timing Chain Tensioner; Assembling The Timing Chain Cover; Installing The Rocker Arms And Rocker Arm Shafts - Yamaha YZF-R1 Series Service Manual

• Timing chain guide (top side)
Damage/wear → Replace the defective
part(s).
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.
Valve spring compressor
90890-04019
Valve spring compressor
YM-04019
a
1
b
1
b. Keep pressing the timing chain tensioner
rod, mount clip "4" into groove "5", and
lock the timing chain tensioner rod.
c. Push the timing chain tensioner rod in di-
rection "c".
d. Make sure that the timing chain tensioner
rod can smoothly move out from the timing
chain tensioner housing in direction "d". If
not smooth, replace the timing chain ten-
sioner assembly.
EAS31744

ASSEMBLING THE TIMING CHAIN COVER

1. Install:
• Oil seal "1"
TIP
Install the oil seal with a socket "2" that matches
its outside diameter.
2
3
2. Install:
• Washer
• Circlip
EAS31657
INSTALLING THE ROCKER ARMS AND
ROCKER ARM SHAFTS
1. Install:
• Rocker arm
• Rocker arm shaft "1"
• Rocker arm shaft bolt "2"
• Straight plug "3"
TIP
• Align the end surface "a" of the rocker arm
shaft with the surface "b" of the cylinder head.
• After installing the rocker arm shaft bolt, make
sure that the rocker arm shaft turns smoothly.
5-27
CAMSHAFTS
5
c
d
New
Installed depth "a"
4.0–4.5 mm (0.16–0.18 in)
1 2
New
4
a