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63 mm "MHR 177" racing cylinder kit compatible with your Vespa large-frame scooter. You can find a list of the exact models below in the drop-down menu under "Compatible with the following models."
The 177 cc aluminum cylinder is designed for a 57 mm stroke and features a 63 mm bore, 7 overflow channels, and a two-piece exhaust port. The coated cylinder bore, combined with the aluminum body, ensures effective heat dissipation and makes this tuning cylinder a solid foundation for performance-oriented large-frame engines. The bolt-on exhaust flange gives you additional flexibility during further assembly if your engine setup is designed specifically for tuning.
The package includes the cylinder, the piston with piston ring, and the cylinder head.
Note: Please observe the installation direction during assembly. The piston is installed with the arrow pointing toward the exhaust on the exhaust side.
You can find matching crankshafts, exhaust systems, and carburetors for tuning in the accessories section.
A quality product from the Italian manufacturer Malossi.
| Manufacturer | Malossi |
| Material | Aluminum |
| Camouflaged | No |
| Displacement | 177 ccm |
| Crankshaft stroke | 57 mm |
| Ø cylinder neck | 67 mm |
| Ø Outlet outside | 37 mm |
| Ø outlet inside | 33.9 mm |
| Hole spacing outlet | 55 mm |
| Number of fixing points | 4 pcs |
| Ø piston pin (B) | 15 mm |
| Outlet type | straight |
| Area of application | Tuning |
| Decompressor | No |
| Vespa | Vespa PX, T5, Cosa - 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 , Cosa 125 · VNR1T · I 1988–1992 II 1992–1998 , Cosa 150 · VLR1T · I 1988–1991 II 1992–1995 Vespa Rally, Sprint, GT, GTR, TS, SS180, GS160 - 125 GTR · VNL2T · 1968–1978 , 125 Sprint · VNL2T · 1965–1974 , 150 Sprint · VLB1T · 1965–1974 , 150 Sprint Veloce · VLB1T · 1969–1979 , 125 GT · VNL2T · 1966–1973 , 125 TS · VNL3T · 1975–1978 Vespa VNA, VNB, VBA, VBB, Super, GT - 150 Super · VBC1T · 1965–1979 |
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