Yamaha RS90K, Service Manual

Page: 752 / 841

9-21
SPEC
TIGHTENING TORQUE
NOTE:
*1: Tighten the cylinder head bolts to 15 Nm (1.5 m · kg, 11 ft · lb) in the proper tightening sequence, loosen
and retighten the cylinder head bolts to 15 Nm (1.5 m · kg, 11 ft · lb) in the proper tightening sequence,
and then tighten the cylinder head bolts further to reach the specified angle 65 ~ 70° in the proper tighten-
ing sequence.
*2: Tighten the crankcase bolts to 20 Nm (2.0 m · kg, 14 ft · lb) in the proper tightening sequence, loosen and
retighten the crankcase bolts to 20 Nm (2.0 m · kg, 14 ft · lb) in the proper tightening sequence, and then
tighten the crankcase bolts further to reach the specified angle 120° in the proper tightening sequence.
*3: Tighten the connecting rod nuts to 20 Nm (2.0 m · kg, 14 ft · lb), and then tighten the connecting rod nuts
further to reach the specified angle 120°.
Primary sheave drive shaft assembly bolt 12 1.2 8.7
Connecting rod and cap See NOTE.
*3
Balancer 35 3.5 25
Balancer shaft bearing retainer 10 1.0 7.2 Apply LOCTITE
®
A.C. magneto rotor 130 13 94 Apply the engine oil.
A.C. magneto rotor cover bolt (M6
×
1.0)
×
11 12 1.2 8.7
A.C. magneto rotor cover bolt (M6
×
1.0)
×
1 12 1.2 8.7 Apply LOCTITE
®
Starter clutch 12 1.2 8.7 Apply LOCTITE
®
Stator coil 10 1.0 7.2 Apply LOCTITE
®
Pickup coil 6 0.6 4.3 Apply LOCTITE
®
A.C. magneto lead holder 10 1.0 7.2 Apply LOCTITE
®
Carburetor joint 10 1.0 7.2
Air filter case joint clamp screw 3 0.3 2.2
Starter motor 27 2.7 20
Fuel pump 10 1.0 7.2
Fuel pump stay 10 1.0 7.2
Fuel tank 10 1.0 7.2
Starter motor lead 7 0.7 5.1
Throttle cable locknut 6 0.6 4.3
Rectifier/regulator 8 0.8 5.8
Ground earth lead (engine mounting bracket) 25 2.5 18
Ground earth lead (Ignitor unit) 7 0.7 5.1
Frame cross member (front) 23 2.3 17
Frame cross member (side [front]) 45 4.5 32
Frame cross member (side [rear]) 23 2.3 17
Parts to be tightened
Tightening torque
Remarks
Nm m · kg ft · lb