5-15
5-16
CAMSHAFT
VALVES AND VALVE SPRINGS
2. Check:
• Rocker arm shaft
Blue discoloration/excessive wear/pit-
ting/scratches
→
Replace or check the lubri-
cation system.
3. Measure:
• Rocker arm inside diameter “a”
Out of specification
→
Replace.
4. Measure:
• Rocker arm shaft outside diameter “a”
Out of specification
→
Replace.
5. Calculate:
• Rocker-arm-to-rocker-arm-shaft clearance
Calculate the clearance by subtracting the rock-
er arm shaft outside diameter from the rocker
arm inside diameter.
Out of specification
→
Replace the defective
part(s).
INSTALLING THE CAMSHAFT AND ROCKER
ARMS
1. Lubricate:
• Rocker arms
• Rocker arm shafts
2. Lubricate:
• Camshaft
3. Install:
• Intake and exhaust rocker arms
• Rocker arm shafts “1”
• Make sure that the cutout “a” in each rocker
arm shaft is facing downward as shown in the
illustration.
• Make sure the rocker arm shafts (intake and
exhaust) are completely pushed into the cylin-
der head.
Rocker arm inside diameter
9.985–10.000 mm
Limit
10.030 mm
Rocker arm shaft outside diame-
ter
9.966–9.976 mm
Limit
9.950 mm
Recommended lubricant
Rocker arm inner surface
Molybdenum disulfide oil
Rocker arm shaft
Engine oil
Recommended lubricant
Camshaft
Molybdenum disulfide oil
Camshaft bearing
Engine oil
VALVES AND VALVE SPRINGS
Removing the valves and valve springs
Order
Job/Parts to remove
Qty
Remarks
Cylinder head
Refer to “CYLINDER HEAD” on page 5-6.
Rocker arms/Camshaft
Refer to “CAMSHAFT” on page 5-13.
1
Valve cotter
8
2
Upper spring seat
4
3
Valve spring
4
4
Intake valve
2
5
Exhaust valve
2
6
Valve stem seal
4
7
Lower spring seat
4
8
Valve guide
4
For installation, reverse the removal proce-
dure.
New
New
New
New
M
M
M
M
M
M
M
1
2
3
6
7
8
1
2
3
6
7
8
1
2
3
6
7
8
1
2
3
6
7
8
4
4
5
5
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 ...