Motorcycle engines, motorcycles and structural parts therefor, namely, kickstands, saddlebags, sidecars, tire chains, differentials, brake cables, clutch cables, fork bearings and races, fork dust boots, fork seals, wind shields, handle bars, handle bar control levers, handle bar dampers, handle bar grips, brake calipers, brake pedals, brake rotors, front spacers, front dash panels, shift levers, headlight mounts, fenders, mud guards, license plate fasteners, frames and holders, luggage racks, side panels, wheel hubs, pneumatic tires and inner tubes