Engines

Scooter99 · Engines

New Engine PX 150C

Factory-new PX 150C engine for classic Vespa builds, restorations, and sidecar projects. Tuned for reliability, everyday rideability, and that unmistakable two-stroke character trusted by riders worldwide.

151 cc · 2-Stroke Max torque 17.5 Nm @ 6,500 rpm Electric & kick starter
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Scooter99 brand new PX 150C Vespa engine on display
Brand new PX 150C engine · Scooter99 workshop

Core Specifications

Key technical details for builders, restorers, and collectors.

Engine type Single cylinder, two-stroke
Displacement 151 cc
Bore × Stroke 2.32 in × 2.28 in (58 mm × 57 mm)
Fuel Unleaded · mix two-stroke oil
Compression ratio 8:1
Max torque 12.9 lbs·ft (17.5 Nm) @ 6,500 rpm
Induction Rotating valve in crankcase
Ignition Electronic CDI
Starter Electric and kick starter
Cooling Forced air
Gear change Manual, four-speed
Clutch Oil wet clutch
Maximum speed 56 mph (90 km/h)
Fuel tank capacity 2.1 gallons (8 liters)
Power CV 8.2 at 6,000 rpm
Lubricant tank 0.4 gallon (1.5 liters)
Rear wheel Pressed steel rim 2.10 - 10"
Rear tire Tube type 3.5 - 10"
Rear brake 5.9 in (150 mm) drum, mechanically commanded
Rear suspension Engine as oscillating arm, double effect damper

Mounted PX 150C Engine

Visual reference of the PX 150C engine installed on a Vespa build, prepared and tuned by the Scooter99 workshop.

Scooter99 PX 150C engine mounted on Vespa frame
PX150C · Installed configuration · Scooter99 workshop

Recondition Packages

Engine refresh options for different electrical setups.

Scooter99 recondition PX engine package with CDI

Recondition Engine with CDI

Complete rebuild with upgraded 12V CDI electrical system.

  • Piston and ring
  • PS cylinder block (3 ports) for better performance
  • Cylinder head
  • PS De Lorto carburetor
  • Air filter
  • Air hose
  • Conrod on original crankshaft
  • 12V magnet
  • Bearings and seals
  • Clutch plate
  • Ignition coils set
  • Exhaust with chrome megaphone tip
  • Brake pedal
  • Kick start lever
  • Spark plug
  • Gasket
  • Upgrade 12 volt CDI electrical system
  • No rebuilt or reused parts
With CDI Ideal for full electrical upgrade builds.
Scooter99 recondition PX engine package without CDI

Recondition Engine without CDI

Rebuild option for non-CDI / points ignition setups.

  • Piston and ring
  • PS cylinder block (3 ports) for better performance
  • Cylinder head
  • PS De Lorto carburetor
  • Air filter
  • Air hose
  • Conrod on original crankshaft
  • 12V magnet
  • Bearings and seals
  • Clutch plate
  • Ignition coils set
  • Exhaust with chrome megaphone tip
  • Brake pedal
  • Kick start lever
  • Spark plug
  • Condenser
  • Point
  • Gasket