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:Harley Davidson Sportster Café RacerMaico 125 GP 1972Vincent HRD "GUNGA DIN" 1951Kobra Electric Motorcycle BY by Cristiano GiuggioliBentech RG2KTM 1290 Super Enduro R by Jiří HeiníkKawasaki KLE 500Kawasaki ZG 1200 Voyager XII