Custom Triumph Grand Prix 1947 Triumph Grand Prix 1947 SPECIFICATIONS, PRICE & IMAGES Engine: parallel twin 500 c.c. o.h.v.; valve operation by Ignition: magneto. Transmission: chain via four-speed gearbox. Frame: cradle type with single down-tube and twin Forks: telescopic. Bike Features More Bike Specifications:Caligo by Habermann PerformanceKawasaki W3 650Kawasaki Z2 750RSKawasaki Z-X10R Ninja SEDucati Diciotto KawasakiKawasaki BR 250 Casual SportsKawasaki ZX-6RR