History
The V1 appeared in dozens of brands — General, Cimatti, Testi, Fantic, and more. One engine, infinite frame badges. Italian two-stroke tuning logic applies: premix, porting, pipe, jetting. The 85 mm connecting rod length is the reference in port-timing calculators (vs 90 mm on Puch E50).
Minarelli sold the V1 as a modular package to manufacturers who needed a proven 49cc two-stroke without designing their own case. That is why a chopper-styled Fantic and a plain commuter can share internals. US imports often arrived through department-store brands that are obscure today but plentiful on Craigslist if you know the engine.
Identify the frame brand before you order plastics. Engine parts cross freely; tanks, fenders, and cable lengths do not. A good V1 rebuild starts with compression and crank seal tests before any performance spending.
Port-timing math on a V1 uses that 85 mm rod — plug the correct number into the calculator or your exhaust timing will be wrong by a mile.
Quick specs
| Stroke | 42 mm (V1 port-inducted) |
| Rod length | 85 mm (port math reference) |
| Transmission | Single-speed centrifugal clutch (not variator) |
| Brands | General, Cimatti, Testi, … |
| Oil mix | 50:1 typical |
Three build paths (mild → wild) → Oil mix chart Manuals & PDFs →