Prima 4mm Main Jet Tuning Kit - Keihin PB & CVK Carburetors Clutches (manual) First oversize replacement piston ring

First oversize replacement piston ring for the PCK2 P125/150/Stella Polini kit

External ignition coil

and SYM DD50 Vespa / Lambretta Vintage 2-stroke performance tuning (requires manifold) Technical Specs

Brand Model Genuine Hooligan 170 / Hooligan 170i Not legal for use in California on pollution-controlled vehicles

Choke: Integrated Manual Pull-Button

Prima 4mm Main Jet Tuning Kit - Keihin PB & CVK Carburetors Clutches (manual) First oversize replacement piston ringFine Tune Your Fuel: 10 Piece Prima 4mm Main Jet Kit Standard factory jetting is almost always "lean" to meet emissions standards, which can leave your scooter feeling sluggish. The Prima 4mm Main Jet Kit is the essential tool for riders installing big bore kits, performance exhausts, or high flow air filters. With 10 precision machined sizes, you can eliminate "flat spots" and find the perfect air fuel ratio for maximum throttle response. The Tuners