Name Torque in Nm
Flywheel fan screws 3 ÷ 4
Half-crank case joint bolts 12 ÷ 13
Bolts holding exhaust pipe to the crankcase 22 ÷ 24
Screws holding the filter box to the crank case 4 ÷ 5
Head nuts 10 ÷ 11
Starter screws 12 ÷ 13
Ignition spark plug 25 ÷ 30
Hub oil drainage cap 3 ÷ 5
Oil hub level dipstick Manual
Rear hub cap screws 12 ÷ 13
Transmission cover screws 12 ÷ 13
Inlet manifold screws 8 ÷ 9
Flywheel hood fixing screws 1 ÷ 2
Cylinder hood fixing screws 3.5 ÷ 5
Stator clamping screws 3 ÷ 4
Pick-Up clamping screw 4 ÷ 5
Mixer clamping screws 3 ÷ 4
Screw fixing brake lever to the journal on the engine 12 ÷ 13
FRAME ASSEMBLY
Name Torque in Nm
Swinging arm - engine pin* 33 ÷ 41
Swinging arm pin - frame 44 ÷ 52
Shock absorber - chassis nut (*) 20 to 25 Nm
Swinging arm - frame plate 33 ÷ 41
shock absorber - engine pin (*) 33 to 41 N·m
Rear wheel nut 137 ÷ 152
Side stand fixing screw 12 ÷ 20
Side stand bracket fixing screw 15 ÷ 20
Overhaul data
Assembly clearances
Cylinder - piston assy.
COUPLING BETWEEN PISTON AND CYLINDER
Name
Initials Cylinder Piston Play on fitting
Standard coupling M 40.005 - 40.012 39.943 - 39.95 0.055 - 0.069
Standard coupling N 40.012 - 40.019 39.95 - 39.957 0.055 - 0.069
Standard coupling O 40.019 - 40.026 39.957 - 39.964 0.055 - 0.069
Standard coupling P 40.026 - 40.033 39.964 - 39.971 0.055 - 0.069
coupling 1st oversize M1 40.205 - 40.212 40.143 - 40.15 0.055 - 0.069
coupling 1st oversize N1 40.212 - 40.219 40.15 - 40.157 0.055 - 0.069
coupling 1st oversize O1 40.219 - 40.226 40.157 - 40.164 0.055 - 0.069
coupling 1st oversize P1 40.226 - 40.233 40.164 - 40.171 0.055 - 0.069
Coupling 2nd oversize M2 40.405 - 40.412 40.343 - 40.35 0.055 - 0.069
Coupling 2nd oversize N2 40.412 - 40.419 40.35 - 40.357 0.055 - 0.069
Coupling 2nd oversize O2 40.419 - 40.426 40.357 - 40.364 0.055 - 0.069
Coupling 2nd oversize P2 40.426 - 40.433 40.364 - 40.371 0.055 - 0.069
Vespa LX 50 Characteristics
CHAR - 13
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