VLB1M is a Vespa engine prefix/VIN code.

VLB1M is engine VIN number for 150cc engine used in 150 Sprint, 150 Sprint Veloce vespa models made through years 1965 - 1979.
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.

VLB1M engine specification

150 Sprint (1965 - 1971) VLB1M engine specs

Production 121,068 copies Colors blue-gray metallic Frame numbers VLB1T 01001-120547 - VLB2T 50001-51253 Engine Cylinders / time 2-stroke single cylinder Displacement 145.5 cc Bore and stroke 57 X 57 mm Compression ratio 7,5:1 Power / RPM 7.7 hp / 5000 rpm Torque / revs nd Cooling Forced air Distribution rotating Supply Orchard carburetor SI 20-17 (20 mm) Mixture 2% Ignition Flywheel Magnet Start Crank Clutch Multiple disc in oil bath Change 4-speed knob Cycling Frame Monocoque Front suspension Pull rod wheel with coil spring and shock absorber Rear Suspension helical spring and shock absorber Final Drive Direct Wheels Cantilever interchangeable with disk decomposable Front brake 125 mm drum Rear brake 127 mm drum Tires 3.50 X 10 front and rear Dimensions and Weight Length 1770 mm Width 670mm Seat height 810 mm Wheelbase 1200 mm Tank 7.6 liters Weight 89kg Performance claims Speed ​​'maximum 95 Km / h acceleration 0-75 km \ h 17 sec consumption 2.8 liters / 100 km

150 Sprint Veloce (1969 - 1979) VLB1M engine specs

Production 218,119 copies Colors gray met. blue green red blue Frame numbers VLB1T 150001-368120 Engine Cylinders / time 2-stroke single cylinder Displacement 145.5 cc Bore and stroke 57 x 57 mm Compression ratio 8:1 Power / RPM 8.5 hp / 5800 rpm Torque / revs nd Cooling Forced air Distribution rotating Supply Carburetor orchard 20 \ 20 Mixture 2% Ignition flywheel Start crank Clutch multiple discs 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 Drum 150 mm Rear brake Drum 150 mm Tires 3.50 X 10 front and rear Dimensions and Weight Length 1770 mm Width 670 mm Seat height 810 mm Wheelbase 1200 mm Tank 7.5 liters Weight 95 Kg Performance claims Speed ​​'maximum 97 Km / h acceleration 0-75 in 15 sec consumption 2.2-liter \ 100 km

150 Sprint 1965-1971150 Sprint
150 Sprint Veloce 1969-1979150 Sprint Veloce