5-9
5-10
CYLINDER HEAD
CYLINDER HEAD
2. Check:
• Cylinder head
Damage/scratches
→
Replace.
• Cylinder head water jacket
Mineral deposits/rust
→
Eliminate.
3. Measure:
• Cylinder head warpage
Out of specification
→
Resurface the cylinder
head.
a. Place a straightedge “1” and a thickness
gauge “2” across the cylinder head.
b. Measure the warpage.
c. If the limit is exceeded, resurface the cylinder
head as follows.
d. Place a 400–600 grit wet sandpaper on the
surface plate and resurface the cylinder head
using a figure-eight sanding pattern.
NOTE:
To ensure an even surface, rotate the cylinder
head several times.
CHECKING THE CAMSHAFT SPROCKET
AND TIMING CHAIN GUIDE
1. Check:
• Camshaft sprocket
More than 1/4 tooth wear “a”
→
Replace the
camshaft sprocket, timing chain and crank-
shaft as a set.
2. Check:
• Timing chain guide (exhaust side)
Damage/wear
→
Replace.
CHECKING THE TIMING CHAIN TENSIONER
1. Check:
• Timing chain tensioner
Cracks/damage/rough movement
→
Re-
place.
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.
b. Remove the screwdriver and slowly release
the timing chain tensioner rod.
c. Make sure that the timing chain tensioner rod
comes out of the timing chain tensioner hous-
ing smoothly. If there is rough movement, re-
place the timing chain tensioner.
Warpage limit
0.03 mm
a. 1/4 tooth
b. Correct
1. Timing chain roller
2. Camshaft sprocket
1
ssssssssssssssssssssssssss
ssssssssssssssssssssssssss
CHECKING THE DECOMPRESSION SYSTEM
1. Check:
• Decompression system
a. Check the decompression system with the
camshaft sprocket and the decompression
cam installed to the camshaft.
b. Check that the decompression lever “1”
moves smoothly.
c. Without operating the decompression lever,
check that the decompression cam “2”
projects from the camshaft (exhaust cam) as
shown in the illustration “A”.
d. Move the decompression lever “1” in the di-
rection of the arrow shown and check that the
decompression cam does not project from
the camshaft (exhaust cam) as shown in the
illustration “B”.
INSTALLING THE CYLINDER HEAD
1. Install:
• Cylinder head
Pass the timing chain through the timing chain
cavity.
2. Tighten:
• Cylinder head bolts “1”
• Cylinder head bolts “2”
• Lubricate the cylinder head bolts with engine
oil.
• Tighten the cylinder head bolts in the proper
tightening sequence as shown and torque
them in two stages.
3. Install:
• Camshaft sprocket
a. Turn the crankshaft counterclockwise.
b. Align the “I” mark “a” on the magneto rotor
with the stationary pointer “b” on the magneto
cover.
A
Cylinder head bolt
22 Nm (2.2 m·kg, 16 ft·lb)
Cylinder head bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)
2
B
Summary of Contents for YZF-R15
Page 1: ...2008 SERVICE MANUAL YZF R15 20P F8197 E0 ...
Page 33: ...2 14 ELECTRICAL SPECIFICATIONS Coil resistance 54 0 66 0 Fuse 20 0A Ω Fuse ...
Page 46: ...2 27 LUBRICATION POINTS AND LUBRICANT TYPES LUBRICATION DIAGRAMS A 1 2 3 4 5 6 7 ...
Page 48: ...2 29 LUBRICATION POINTS AND LUBRICANT TYPES 1 2 3 4 ...
Page 49: ...2 30 LUBRICATION POINTS AND LUBRICANT TYPES 1 Camshaft 2 Crankshaft 3 Main axle 4 Drive axle ...
Page 50: ...2 31 COOLING SYSTEM DIAGRAMS COOLING SYSTEM DIAGRAMS 1 2 3 4 1 5 7 6 4 ...
Page 52: ...2 33 CABLE ROUTING CABLE ROUTING 1 5 2 3 6 4 8 7 ...
Page 54: ...2 35 CABLE ROUTING A A B B C C A A C C B B A B C 1 2 3 4 5 4 5 6 6 7 8 9 10 11 10 11 12 12 ...
Page 56: ...2 37 CABLE ROUTING 1 2 5 4 3 ...
Page 60: ...2 41 CABLE ROUTING A A B C D E 1 2 3 4 5 6 7 8 9 10 A ...
Page 121: ...4 24 FRONT BRAKE Refer to BLEEDING THE HYDRAULIC BRAKE SYSTEM on page 3 18 ...
Page 249: ...7 8 THROTTLE BODY ...
Page 250: ...7 9 AIR INDUCTION SYSTEM AIR INDUCTION SYSTEM 1 2 5 4 5 6 3 2 1 6 4 3 ...
Page 257: ......
Page 269: ...8 12 CHARGING SYSTEM 1 AC magneto 2 Rectifier regulator 3 Battery 42 Fuse ...
Page 271: ...8 14 CHARGING SYSTEM ...
Page 275: ...8 18 LIGHTING SYSTEM ...
Page 285: ...8 28 COOLING SYSTEM ...
Page 311: ...8 54 FUEL PUMP SYSTEM ...