Yamaha R1 Series 2015 Service Manual page 361

evenly or damage to the cylinder head,
camshaft caps, and camshafts will result.
• Do not turn the crankshaft when installing
the camshaft to avoid damage or improper
valve timing.
ECA23010
NOTICE
There are two kinds of camshaft cap bolts
with different lengths. Be sure to install each
bolt onto the correct position.
a b
a. Camshaft cap bolt (black): 40 mm (1.57 in)
b. Camshaft cap bolt (silver): 35 mm (1.38 in)
A. Intake side
B. Exhaust side
6. Install:
• Timing chain tensioner
• Timing chain tensioner gasket
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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 b
New
5-20
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. In the status of step (b), install the rod assem-
bly in the cylinder block.
TIP
Always use a new gasket.
Timing chain tensioner bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
LOCTITE®
d. Unlock the timing chain tensioner by turning
the crankshaft clockwise, and tension the tim-
ing chain.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
7. Turn:
• Crankshaft
(several turns counterclockwise)
8. Check:
• Mark "a"
Make sure the mark "a" on the generator rotor
CAMSHAFTS
a
2
3
5
4