Additional 55 / 160 (2.91) for the SI carburetor, suitable for your Vespa Largeframe scooter. You can find a list of the exact models in the drop-down menu below under «suitable for the following models».
The bypass is a central component for the tuning of your SI carburetor and primarily influences the lower to medium speed range. In the case of SI secondary throttles with a double designation, it is not only responsible for fuel metering: due to the design, the petrol is premixed with air in the throttle body, which supports mixture preparation in the partial load range. The designation 55 / 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.
| Manufacturer | Dell'Orto |
| Camouflaged | No |
| Material | Brass |
| Component group Carburetor | Spraying |
| Carburetor type | SI |
| Nozzle type | Secondary nozzle |
| Nozzle thread | M5x0.8 (standard thread) |
| Drive | Slot |
| Total length | 28.9 mm |
| Thread length | 5.5 mm |
| 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) Vespa Rally, Sprint, GT, GTR, TS, SS180, GS160 - 125 GTR · VNL2T · 1968–1978 , 125 Sprint · VNL2T · 1965–1974 , 150 Tours/ T4 · VGLA1T · 1959–1963 / Type 202 Augsburg , 150 T4 · VGLA1T · 1959–1963 / Type 332 Augsburg , 150 GL · VLA1T · 1963–1965 , 150 Sprint · VLB1T · 1965–1974 , 150 Sprint Veloce · VLB1T · 1969–1979 , 175 Rally · VRD · 1968–1973 CH , 180 Rally · VSD1T · 1968–1973 , 200 Rally · VSE1T · 1973–1979 , 125 GT · VNL2T · 1966–1973 , 125 TS · VNL3T · 1975–1978 , 150 Tours/ T4 · VGLB1T · 1959–1963 / Type 332 Augsburg Vespa VNA, VNB, VBA, VBB, Super, GT - 125 · VNB1T · 1960 , 125 · VNB2T · 1961 , 125 · VNB3T · 1962 , 125 · VNB4T · 1963 , 125 · VNB6T · 1965 , 125 · VNB5T · 1964 , 125 Popolino · VNS1T – VNS6T · 1959–1965 (Sweden) , 125 T · VNT1T · 1961 Export CH , 150 · VBA1T · 1958–1960 , 125 GT · VNT2 · 1962 (CH-F) , 150 · VBB1T · 1961–1962 , 150 · VBB2T · 1963–1967 , 125 GT · VNL1T · 1963–1964 CH & F , 150 Super · VBC1T · 1965–1979 , 125 Super · VNC1T · 1965–1969 |
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