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 AR 80Kawasaki Z 750FKawasaki W 800 Special EditionKawasaki ZR-X 1200Gilera Saturno SanremoBMW R NineT Concepts by Iban Domigo & Xavier VairaiHonda NR 500 GPDP Customs del Rey