Additional 48 / 160 (3.34) for the SI carburetor, suitable for your Vespa Largeframe scooter. You can find a list of the exact models below in the drop-down menu under «suitable for the following models».
The bypass is a central component for the tuning of your SI carburetor and primarily influences the low to medium speed range. In the case of SI secondary throttles with a double designation, it is not only responsible for pure fuel metering: due to the design, the gasoline is already premixed with air in the throttle, which supports mixture preparation in the partial load range. The designation 48 / 160 stands for the ratio of the two figures. The smaller the calculated value, the «richer» your scooter runs at moderate engine speeds, the larger, the «leaner». Especially for longer trips in the half-throttle range, it is worth tuning up here.
| Material | Brass |
| Manufacturer | Dell'Orto |
| Component group Carburetor | Spraying |
| Carburetor type | SI |
| Total length | 28.9 mm |
| Nozzle type | Secondary nozzle |
| Drive | Slot |
| Thread length | 5.5 mm |
| Nozzle thread | M5x0.8 (standard thread) |
| Camouflaged | No |
| Vespa | Vespa PX, T5, Cosa - PX80 E Lusso · V8X1T · 1983–1993 Lusso / Arcobaleno , PX100E · VIX1T · India , P125X · VNX1T · 1977–1982 (Old PX) External Lock , P125X · VNX2T · 1981–1984 (Old PX) Internal Lock , PX125 E · VNX2T · 1982–1993 / Lusso / Arcobaleno , PX125 · VNX2T · 1993–1996 Classic , PX125 · VNX2T · 1997–1999 (Disc) , PX125 · ZAPM471 · 2001 Model Year Catalytic Converter , P150X · VLX1T · 1978–1993 , P150S · VBX1T · 1978–1990 , PX150 · ZAPM742 · 2001 Model Year Catalytic Converter , P200E · VSX1T · 1977–1984 (Ignition Switch on Steering Head) , PX200 · VSX1T · 1984–1993 Lusso / Arcobaleno , PX200 · VSX1T · 1993–1996 Classic , PX200 · VSX1T · 1997–1999 (Disc) , P80X · V8X1T · old (ignition switch on steering head) |
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