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:Yamaha XT 600 Pro Desert SonBMW K75 S Cafe Racer by Hammer KraftradMaico 125 GP 1972BMW R 1250S by Oberdan BezziKawasaki GPz 400RKawasaki KLR 600Seeley Norton 750Kawasaki Z 400