Yamaha YZF-R1 Kit Manual page 32

Installation
1. Fit the scratch line on the camshaft to the
compression top dead point 105 degree (K
mark position) to combine the camshaft
and cylinder head surface.
2. Adjust the valve timing (to the value stated
on the normal specifications) using the
long holes.
<How to position at #1 cylinder's compression top dead point 105°>
< Position to install the cam sprocket at #1 cylinder compression top dead point 105°>
Tighten using the long holes on the cam sprocket.
Intake valve timing mark
(Scratch line)
TIP
For valve timing adjustment, refer to the
KIT TOOL MANUAL.
Fit the assembly (K) mark of the rotor
assembly to the case surface line.
(#1 cylinder compression top dead
point 105 degree)
Intake #1 cam nose
Exhaust side
#1 #2
Intake side
– 29 –
TIP
Install the cam sprocket as the scratch
line and 2CR mark face the outside of the
engine.
Exhaust #1 cam nose
Exhaust valve timing mark
(Scratch line)
#3 #4
NOTICE
When fitting the camshaft, use the slotted
holes of the cam sprockets and always
set the timing to match. If otherwise, no
intended performance can be expected and
more over, the engine may be damaged.