Yamaha YP125R Service Manual

TIGHTENING TORQUES (YP250R)
2-63
EAS20340
ENGINE TIGHTENING TORQUES
Item
Thread
size
Q’ty Tightening torque Remarks
Exhaust pipe nut M8 2 20 Nm (2.0 m·kgf, 14 ft·lbf)
Muffler bolt M10 3 53 Nm (5.3 m·kgf, 38 ft·lbf)
Muffler joint bolt M8 1 14 Nm (1.4 m·kgf, 10 ft·lbf)
O
2
sensor
M18 1 45 Nm (4.5 m·kgf, 32 ft·lbf)
Oil check bolt M6 1 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
Tappet cover bolt M6 5 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Cylinder head nut M8 4 22 Nm (2.2 m·kgf, 16 ft·lbf)
Cylinder head bolt M6 2 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Cylinder head stud bolt M8 4 13 Nm (1.3 m·kgf, 9.4 ft·lbf)
Exhaust pipe stud bolt M8 2 13 Nm (1.3 m·kgf, 9.4 ft·lbf)
Timing chain tensioner bolt M6 2 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Timing chain tensioner cap bolt M8 1 8 Nm (0.8 m·kgf, 5.8 ft·lbf)
Spark plug M12 1 18 Nm (1.8 m·kgf, 13 ft·lbf)
Coolant temperature sensor M12 1 18 Nm (1.8 m·kgf, 13 ft·lbf)
Camshaft sprocket cover bolt M6 2 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Camshaft sprocket bolt M10 1 60 Nm (6.0 m·kgf, 43 ft·lbf)
Camshaft retainer bolt M6 2 8 Nm (0.8 m·kgf, 5.8 ft·lbf)
Valve clearance adjusting screw
locknut
M6 2 14 Nm (1.4 m·kgf, 10 ft·lbf)
V-belt case cover bolt M6 1 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
V-belt case cover screw M6 3 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
V-belt case bolt M6 11 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Primary sheave nut M14 1 80 Nm (8.0 m·kgf, 58 ft·lbf)
Secondary sheave nut M14 1 60 Nm (6.0 m·kgf, 43 ft·lbf)
Secondary sheave bracket bolt M8 4 22 Nm (2.2 m·kgf, 16 ft·lbf)
Primary sheave cap bolt M4 4 3 Nm (0.3 m·kgf, 2.2 ft·lbf)
Clutch carrier nut M36 1 90 Nm (9.0 m·kgf, 65 ft·lbf)
Timing mark accessing plug M16 1 8 Nm (0.8 m·kgf, 5.8 ft·lbf)
Generator cover bolt M6 10 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Stator coil bolt M6 3 10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Crankshaft position sensor bolt M5 2 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
Generator rotor nut M16 1 80 Nm (8.0 m·kgf, 58 ft·lbf)
Starter clutch bolt M8 3 30 Nm (3.0 m·kgf, 22 ft·lbf)
Starter motor bolt M6 2 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
Starter motor bush holder set nut M6 1 7 Nm (0.7 m·kgf, 5.1 ft·lbf)
Starter motor front cover bolt M5 2 5 Nm (0.5 m·kgf, 3.6 ft·lbf)
Oil baffle plate bolt M6 2 12 Nm (1.2 m·kgf, 8.7 ft·lbf)
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Yamaha YP125R Specifications

General

Engine Type	Liquid-cooled, 4-stroke, SOHC, 4-valve
Bore x Stroke	52.4 mm x 57.9 mm
Fuel System	Fuel Injection
Ignition System	TCI
Transmission	V-Belt Automatic
Front Suspension	Telescopic fork
Rear Suspension	Unit Swing
Front Brake	Hydraulic single disc, Ø267 mm
Starter System	Electric
Rear Tyre	140/70-14M/C 62P (Tubeless)