COOLING
Name Torque in Nm
Water pump rotor cover 3 ÷ 4
Screws for water pump rotor driving link 3 ÷ 4
Thermostat cover screws 3 ÷ 4
Bleed screw: 3
(°) Apply LOCTITE 242 medium-strength threadlock
(*) The two screws must be tightened to the prescribed torque after having done so with the rear wheel
axle nut. Safety locks: see "Pre-delivery operations".
(^) Fasten the nuts in two crossed passes.
(1) Before fitting the nuts lubricate them with engine oil
Overhaul data
Assembly clearances
Cylinder - piston assy.
ENGINE 125 COUPLING CATEGORIES
Name
Initials Cylinder Piston Play on fitting
Cylinder A 56.997 ÷ 57.004 56.945 ÷ 56.952 0.045 - 0.059
Cylinder B 57.004 ÷ 57.011 56.952 ÷ 56.959 0.045 - 0.059
Piston C 57.011 ÷ 57.018 56.959 ÷ 56.966 0.045 - 0.059
Piston D 57.018 ÷ 57.025 56.966 ÷ 56.973 0.045 - 0.059
Cylinder 1st Oversize A1 57.197 ÷ 57.204 57.145 ÷ 57.152 0.045 - 0.059
Cylinder 1st Oversize B 1 57.204 ÷ 57.211 57.152 ÷ 57.159 0.045 - 0.059
Piston 1st Oversize C 1 57.211 ÷ 57.218 57.159 ÷ 57.166 0.045 - 0.059
Piston 1st Oversize D 1 57.218 ÷ 57.225 57.166 ÷ 57.173 0.045 - 0.059
B 125-250 Characteristics
CHAR - 17
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