VA51M is a Vespa engine prefix/VIN code.
VA51M is engine VIN number for 50cc engine used in PK50s Automatica, PK50s Automatica Elestart, PK50xls plurmatic vespa models made through years 1984 - 1987.
P.S. This engine VIN number is for the engine block/casing and it doesn't mean that over the years and even accross the models there isn't slight modifications of this engine parts, their sizes or even internals.
VA51M engine specification
PK50s Automatica (1984 - 1984) VA51M engine specs
Colors white red blue Engine 2-stroke single cylinder Displacement 49.79 cc Bore and stroke 38.4 X 43 mm Compression ratio 9:1 Power / RPM 1.5 hp / 4500 rpm Torque / revs nd Cooling Forced air Distribution rotating Supply Carburetor orchard 10 Mixture 2% Ignition electronics Start crank Clutch multidisc in oil bath Change 4-speed knob Cycling Frame Monocoque Front suspension Pull rod wheel with coil spring and shock absorber Rear Suspension Coil spring and shock absorber Final Drive Direct Wheels Cantilever interchangeable with disk decomposable Front brake 125 mm drum Rear brake Drum 150 mm Tires 3.00 X 10 front and rear Dimensions and Weight Length 1675 mm Width 700 mm Seat height 790 mm Wheelbase 1175 mm Tank 5.8 liters Weight 70 Kg Performance claims Speed 'maximum 40 km / h acceleration nd consumption 2 l \ 100 km
PK50s Automatica Elestart (1984 - 1986) VA51M engine specs
Production pk 2121 specimens Colors white red blue Frame numbers VAS1T 3000001-3002122 Engine Cylinders / time 2-stroke single cylinder Displacement 49.79 cc Bore and stroke 38.4 X 43 mm Compression ratio 9:1 Power / RPM 1.5 hp / 4500 rpm Torque / revs nd Cooling Forced air Distribution rotating Supply Carburetor orchard 10 Mixture 2% Ignition electronics Start crank Clutch multidisc in oil bath Change 4-speed knob Cycling Frame Monocoque Front suspension Pull rod wheel with coil spring and shock absorber Rear Suspension Coil spring and shock absorber Final Drive Direct Wheels Cantilever interchangeable with disk decomposable Front brake 125 mm drum Rear brake Drum 150 mm Tires 3.00 X 10 front and rear Dimensions and Weight Length 1675 mm Width 700 mm Seat height 790 mm Wheelbase 1175 mm Tank 5.8 liters Weight 70 Kg Performance claims Speed 'maximum 40 km / h acceleration nd consumption 2 l \ 100 km
PK50xls plurmatic (1987 - 1987) VA51M engine specs
No detailed info about engine specification for this model
| PK50s Automatica | 1984-1984 | PK50s Automatica |
| PK50s Automatica Elestart | 1984-1986 | PK50s Automatica Elestart |
| PK50xls plurmatic | 1987-1987 | PK50xls plurmatic |