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 DT250 by One Down Four UpSuzuki Katana by Steve AdamsKawasaki VN 1500 VulcanFB Mondial 250 BialberoAprilia SXV GP45 Super TwinBMW R nine T by Revival Cycles“Street Hawk”Kawasaki Z 750S