Yamaha YBR125 Engine and Chassis Torque Specs
Note: If you have any confusion regarding engine part names, please consult the service manual before using these torque values.
Cylinder head: 16.2ft-lbs
Cylinder head(Side of timing chain): 7.3ft-lbs
Bolt of oil drainage port: 6ft-lbs
Spark plug: 9.5lbs
Side cover 3 of cylinder head: 7.5ft-lbs
Side cover of cylinder head(Air valve):13ft-lbs
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Rotator plate 2 of chain: 51ft-lbs
Guide plate 2 of chain: 8ft-lbs
Locking nut of air valve: 5.5ft-lbs
Timing sproket: 15ft-lbs
Hold-down of cylinder head: 8ft-lbs
Tensioner assy: 8ft-lbs
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Oil pump assy: 6ft-lbs
Oil drainage bolt: 16ft-lbs
Silencer assy(Side of cylinder head): 8ft-lbs
Silencer assy(finished vehicle): 17ft-lbs
Left&right crankcase: 7.3-ft-lbs
Crankcase cover1: 7.3ft-lbs
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Chain cover: 6ft-lbs
Crankcase cover2: 8ft-lbs
Kick starter assy: 40ft-lbs
Hold-down of idler: 6ft-lbs
Start generator assy: 8ft-lbs
Start clutch assy: 22.5ft-lbs
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Main driving gear: 55ft-lbs
Hold-down: 2.5ft-lbs
Clutch hub body: 47ft-lbs
Handle bar seat and inner tube: 18ft-lbs
Handle bar seat and steering shaft: 81ft-lbs
Lower bracket and inner tube: 20ft-lbs
Steering shaft and circular nut: 23ft-lbs
Handle bar and its seat: 18ft-lbs
Caliper and front fork(pan): 18ft-lbs
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Front main cylinder and handle bar(pan): 7ft-lbs
Front portion of engine and support 2 of engine: 27ft-lbs
Support 2 of engine and frame: 40ft-lbs
Rear portion of engine and frame: 28ft-lbs
Upper portion of engine and support3/4 of engine: 28ft-lbs
Support3/4 of engine and frame: 28ft-lbs
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Rotation shaft and nut: 45ft-lbs
Rear shock absorber and rear arm: 25ft-lbs
Rear shock absorber and frame: 230ft-lbs
Pulling rod and rear arm: 13ft-lbs
Fuel tank and fuel cock: 5ft-lbs
Fuel signal sensor: 3ft-lbs
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Front wheel shaft and nut(pan): 65ft-lbs
Front wheel shaft and nut(drum): 35ft-lbs
Rear wheel shaft and nut: 65ft-lbs
Sproket and clutch hub: 28ft-lbs
Pulling rod and brake shoe cover: 14ft-lbs
Cam shaft arm and cam shaft: 7ft-lbs
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Brake pan and front wheel(pan): 17ft-lbs
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