Vespa LX 50 Workshop Manual

Carburettor
50cc Version
Dell'Orto
DELLORTO CARBURETTOR
Specification Desc./Quantity
Type PHVA 17.5 RD
Diffuser diameter Ø 17.5
Regulation reference number 8423
Maximum nozzle: 53
Maximum air nozzle (on the body): Ø 1.5
Tapered pin stamped code: A22
Pin position (notches from above): 1
Diffuser: 209 HA
Minimum nozzle: 32
Minimum air nozzle (on the body): Free
Initial minimum mix screw opening: 1 1/2
Starter jet 50
Starter air nozzle (on the body): Ø 1.5
Stroke of starter pin: 11 mm
Gasoline inlet hole Ø 1.5
Tightening Torques
FRONT BRAKE
Name
Torque in Nm
Brake fluid pump-hose fitting 8 ÷ 12
Brake fluid pipe-calliper fitting 20 ÷ 25
Screw tightening calliper to support 20 ÷ 25
Brake disc screw 5 ÷ 6.5
Oil bleed valve (on the calliper) 10 ÷ 12
Handlebar pump 7 ÷ 10
FRONT SUSPENSION
Name
Torque in Nm
Shock absorber upper nut 20 ÷ 30
Front wheel axle nut 75 ÷ 90
Shock absorber upper bracket bolts 20 ÷ 25
Wheel rim screws 20 ÷ 25
Shock absorber lower bolts (°) 20 ÷ 27
STEERING ASSEMBLY
Name
Torque in Nm
Upper steering ring nut 35 ÷ 40
Steering lower ring nut 8 ÷ 10
Handlebar fixing screw 50 ÷ 55
ENGINE ASSEMBLY
Name
Torque in Nm
Clutch bell nut (**) 40 ÷ 44
Clutch lock ring nut 55 ÷ 60
Nut locking driving pulley on crankshaft (**) 40 ÷ 44 Nm
Start-up lever screw 12 ÷ 13
Flywheel nut (**) 40 ÷ 44
Characteristics Vespa LX 50
CHAR - 12

Vespa LX 50 Specifications

General

Engine Type	Single-cylinder, 4-stroke
Displacement	49.9 cc
Fuel System	Carburetor
Front Brake	200 mm disc
Rear Brake	110 mm drum
Seat Height	785 mm
Fuel Tank Capacity	8.6 liters
Tires Front	110/70 - 11"
Tires Rear	120/70 - 10"
Length	1, 770 mm
Width	705 mm
Cooling System	Air cooled
Transmission	Automatic
Max Power	3.2 kW
Max Torque	4.2 Nm