28mm SC2 SmartCarbs are designed to replace conventional spigot mount top-pull carburetors in 2-stroke applications and will fit most intake manifolds and conventional air boxes that use Keihin PWK 28mm or Mikuni VM 24mm and 26mm carburetors. See dimensional comparisons in the photo gallery below.

Every SmartCarb is pre-configured with baseline settings specific to the application for which it is ordered. We recommend the 25-28mm application on Vespa or Lambretta Small block (<200cc) application for regular road use.

Performance Guarantees

• Ride Faster (+10% Horsepower)

• Ride Farther (+30% Fuel Economy)

• Enjoy crisp, clean, linear throttle response bottom to top!

Tuning/Ease of Use

• Easy External Adjustability (no tools required)

• Ambient Air Density Compensation (no tuning required for elevation, temperature, or humidity)

• Accepts all modern stock throttle cables

• Single Circuit Design (no jets, no accelerator pump, no power-jet)

• Set it and forget it!

Other Features

• No fuel spillage (internally vented, sealed system)

• Reduced emissions output (30-50% reduction)

• Premium, durable construction

• Designed and manufactured in the USA