Its funny that one design that was thought of years ago is still around today, modern motor bikes ares till based on the same design there are a few different things added in but it is still the same part for each engine, piston,crankshaft gearing etc .People have tried different designs over the years but weren't successful and now people making electric racing motor bikes in the TT isle of man races, they do work well and go very fast considering that they are electric but the best bike is still the petrol powered bike which ar still the fast bike around the isle of man course.