Not only in a race the right spark at the right moment can determine victory or defeat.
For double ignition motorcycles, you need two pieces of 50020 and two pieces of DCPR8EKC (50020: thread diameter 14mm / DCPR8EKC: thread diameter 12mm)
Crankshaft sensor / camshaft sensor / hall generator /...
These transmission oils are extreme pressure gear oils...
O-ring 52x2 for throttle housing
Compare BMW part...