2006 YAMAHA TTR125 engine

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Page 398 of 610

YAMAHA TTR125 2006  Owners Manual 4 - 70
ENGCRANKCASE, CRANKSHAFT AND BALANCER
CRANKCASE, CRANKSHAFT AND BALANCER
Extent of removal:1 Crankcase separation2 Balancer removal
3 Crankshaft removal
Extent of removal Order Part name Q’ty

Page 402 of 610

YAMAHA TTR125 2006  Owners Manual 4 - 72
ENGCRANKCASE, CRANKSHAFT AND BALANCER
REMOVAL POINTS
Crankcase
1. Remove:
Bolt (crankcase)
Lead guide 1 
Clutch cable holder 2 
NOTE:
Loosen each bolt 1/4 of a turn at a time and
after all t

Page 406 of 610

YAMAHA TTR125 2006  Owners Manual 4 - 74
ENGCRANKCASE, CRANKSHAFT AND BALANCER
Crankcase
1. Inspect:
Contacting surface a 
Scratches → Replace.
Engine mounting boss b, crankcase 
Cracks/damage → Replace.
2. Inspect:
Bearing
Rot

Page 414 of 610

YAMAHA TTR125 2006  Owners Manual 4 - 78
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
TRANSMISSION, SHIFT CAM AND SHIFT FORK 
Extent of removal:1 Shift cam and shift fork removal2 Main axle and drive axle removal
Extent of removal Order

Page 422 of 610

YAMAHA TTR125 2006  Owners Manual 4 - 82
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
3. Install:
Plain washer 1 
Circlip 2 
NOTE:
Be sure the circlip sharp-edged corner a is
positioned opposite side to the plain washer
and gear b.
B

Page 424 of 610

YAMAHA TTR125 2006  Owners Manual 4 - 83
ENGTRANSMISSION, SHIFT CAM AND SHIFT FORK
Shift cam and shift fork
1. Install:
Shift fork 1 (L) 1 
Shift fork 2 (C) 2 
Shift fork 3 (R) 3 
NOTE:
Mesh the shift fork #1 (L) with the 2nd whee

Page 426 of 610

YAMAHA TTR125 2006  Owners Manual 5 - 1
CHASFRONT WHEEL AND FRONT BRAKE (TT-R125/TT-R125E)
EC500000
CHASSIS
FRONT WHEEL AND FRONT BRAKE (TT-R125/TT-R125E)
Extent of removal:1 Front wheel removal2 Wheel bearing removal
3 Brake shoe pla

Page 440 of 610

YAMAHA TTR125 2006  Owners Manual 5 - 8
CHAS
FRONT WHEEL (TT-R125LW/TT-R125LWE)
Extent of removal:1 Front wheel removal2 Wheel bearing removal
3 Brake disc removal
Extent of removal Order Part name Q’ty Remarks
Preparation for remov