.The Harley-Davidson Dyna family has its roots in the factory-custom revolution of the 1970s. and combines Big Twin performance with an extended FX front end. Dyna models deliver great handling and bold styling. Engine Engine4 Air-cooled. Twin Cam 96 Valves Pushrod-operated. overhead valves with hydraulic. self-adjusting lifters; two valves per cylinder Bore x Stroke 3.75 in. x 4.38 in. (95.25 mm x 111.25 mm) Displacement 96 cu. in. (1584 cc) Compression Ratio 9.2:1 Fuel System5 Electronic Sequential Port Fuel Injection (ESPFI) Air Cleaner Fiberglass Media. washable Lubrication System Pressurized. dry-sump Drivetrain Primary Drive Chain. 34/46 ratio Final Drive6 Belt. 32/66 ratio Clutch Multi-plate. wet Transmission 6-Speed Cruise Drive U.S. Gear Ratios (overall): o 1st 9.311 o 2nd 6.454 o 3rd 4.793 o 4th 3.882 o 5th 3.307 o 6th 2.790 Chassis Frame Mild steel. tubular frame; rect...