Biketoberfest and motorcycle helmets. Offering chopper, Industry Leading knucklehead motors Solutions, and chopper motorcycles. knucklehead motors 1903 production: 3 motorcycles. Most are capable of speeds up to 160 km/h (100 mph), and many of speeds in excess of 200 km/h (122 mph). Choppers were painted either in all black, or in shiny metallic colors, with many chromed parts. . The intake air must be under pressure, since the engine does not have an induction stroke and cannot suck the air in by itself. Double camshafts are required in order to have multiple inlet or exhaust valves that are directly actuated. Two stroke engines generate power every other stroke unlike the four stroke engine that generates power for one out of the four cycles. Production was 1,149 motorcycles. The next-largest cause of loss of speed is rolling resistance. New marketing and new models were broadening hareley's coverage of the motorcycling public. The transfer ports are just a bit lower than the top of the exhaust port, so there is a period of time when fresh air-fuel mixture is coming in while exhaust is leaving. | 
