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VESPA SPORTIQUE (31212) VBB

engine: single cylinder, air cooled 2-stroke

induction: disc valve

bore: 57 mm

stroke: 57 mm

cubic capacity: 145.45 cc

compression ratio: 6.5: 1

bhp at rpm: 5.5 @ 5,000

lubrication: 2% oil

transmission: 4 speed constant mesh

clutch: wet - 3 cork plates

carburetor:Dell 'Orto SI/20/17B

main jet: 100

diffuser: BE/1

main air bleed: 185

throttle valve: No.7

pilot jet: 185

*SI/20/17C from engine #5KC11726

main jet: 100

diffuser: E/1

main air bleed: 185

throttle valve: No.0

pilot jet: 185

starter jet: 60
  • 1st gear: 13.35: 1
  • 2nd gear: 9.32: 1
  • 3rd gear: 6.64: 1
  • 4th gear: 4.73: 1

ignition: contact breaker & coil

ignition timing: 28 degrees BTDC

breaker gap: 0.3 - 0.5 mm

voltage: 6 volt AC battery: 6V 9ah

wheels: 8" tYres: 3.50 x 8"