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:Kawasaki Ninja 250RSpaceSter SportsterDucati Monster S4R Concept by Paolo TesioKawasaki GPz 750F / ZX 750FKawasaki VN 1500 VulcanKawasaki VN 1500 Classic Tourer F1Velocette MSS Compé-clientMoto Guzzi 750 - 1000 Record Racer 1969