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 H2 SX-SE NinjaCW Super 88 by by Cycle WorldKTM 1290 Super Enduro R by Jiří HeiníkArlen Ness SmooftailJames Dean Tribute Bike by Walz Hardcore CyclesCrosby AdventureKawasaki Z 1000STBMW D1200R De Chaves Garage