Interestingly, they race electric motorcycles at the Isle of Mann TT, and the riders all talk about how it's a different game to racing fuel-powered bikes - the bikes are capable of using up all their energy much more quickly that a fuel powered bike, so it becomes as much an efficiency trial as a race, they need to manage their energy consumption to ensure they make it to the finish line (all while still averaging over 100mph around the 40-odd mile mountain racecourse...)