CAMSHAFT
5-15
5. Remove:
• Exhaust camshaft “1”
• Intake camshaft “2”
TIP
Attach a wire “3” to the timing chain to prevent
it from falling into the crankcase.
EASB291215
CHECKING THE CAMSHAFT
1. Check:
• Camshaft lobes
Blue discoloration/pitting/scratches
Re-
place the camshaft.
2. Measure:
• Camshaft lobe dimensions “A” and “B”
Out of specification
Replace the cam-
shaft.
3. Measure:
• Camshaft runout
Out of specification
Replace.
4. Measure:
• Camshaft-journal-to-camshaft-cap clear-
ance
Out of specification
Measure the cam-
shaft journal diameter.
Camshaft lobe dimensions
Intake A
31.730–31.830 mm (1.2492–
1.2531 in)
Limit
31.630 mm (1.2453 in)
Intake B
22.450–22.550 mm (0.8839–
0.8878 in)
Limit
22.350 mm (0.8799 in)
Exhaust A
33.370–33.470 mm (1.3138–
1.3177 in)
Limit
33.270 mm (1.3098 in)
Exhaust B
25.211–25.311 mm (0.9926–
0.9965 in)
Limit
25.111 mm (0.9886 in)
1
2
3
Camshaft runout limit
0.030 mm (0.0012 in)
Camshaft-journal-to-camshaft-
cap clearance
0.028–0.062 mm (0.0011–0.0024
in)
Summary of Contents for YZ 2015 Series
Page 6: ...EASB291006 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Page 10: ......
Page 33: ...CONTROL FUNCTIONS 1 21 a 2...
Page 65: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 22 EASB291066...
Page 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25...
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Page 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29...
Page 74: ...CABLE ROUTING DIAGRAM 2 31 EASB291068 CABLE ROUTING DIAGRAM...
Page 76: ...CABLE ROUTING DIAGRAM 2 33...
Page 78: ...CABLE ROUTING DIAGRAM 2 35...
Page 80: ...CABLE ROUTING DIAGRAM 2 37...
Page 82: ...CABLE ROUTING DIAGRAM 2 39...
Page 84: ...CABLE ROUTING DIAGRAM 2 41...
Page 86: ...CABLE ROUTING DIAGRAM 2 43...
Page 88: ...CABLE ROUTING DIAGRAM 2 45...
Page 128: ...ELECTRICAL SYSTEM 3 38...
Page 200: ...CHAIN DRIVE 4 70...
Page 244: ...ELECTRIC STARTER 5 41...
Page 266: ...OIL PUMP AND BALANCER GEAR 5 63 c d 6 6 7 8 8 b...
Page 286: ...TRANSMISSION 5 83...
Page 306: ...CHECKING THE INTAKE AIR TEMPERATURE SENSOR 8 67 CHECKING THE FUEL INJECTOR 8 68...
Page 321: ...CHARGING SYSTEM 8 15 EASB291338...
Page 325: ...COOLING SYSTEM For JPN 8 19 EASB291341...
Page 355: ...FUEL PUMP SYSTEM 8 49 EASB291348...
Page 356: ...ELECTRICAL COMPONENTS 8 50 ELECTRICAL COMPONENTS EASB291349 8 9 10 1 3 2 4 5 6 7...
Page 358: ...ELECTRICAL COMPONENTS 8 52 11 10 9 2 3 1 6 7 8 4 5...
Page 360: ...ELECTRICAL COMPONENTS 8 54 EASB291350 CHECKING THE SWITCHES 4 1 3 2 E B S E B E B E E B B...
Page 382: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7...