A neat idea, and one that will have you on the edge of your seats for an evening: a game of racing motorcycles. Rules and character generation are simple by design, as you ought to be able to get this game up, running and completed within a single session with minimal preparation - indeed, it can almost be played without a referee (if the players don't squabble too much!).
The aim is that every player will be one of the racers, but there are other people around so those who want to take this concept and make more of it might take on such roles as support staff, race officials and so on. Played as written, however, there are a series of programmed events that will happen at certain points during the proceedings which make it a whole lot more exciting that just motorbikes racing around a track (and that can be exciting enough...).
The action takes place in two parts. There is a race, in which one player-character WILL be killed. That may sound tough, but it's at the heart of the adventure as a whole, because the second part involves another race several years later when the dead racer's child has grown up and comes to participate in their first race (played, of course, by the player of the dead cyclist).
Specific rules associated with bike racing are included, but the main rules are in a separate document: the core One Knight ruleset (it's included with your download) which is consistent across all One Knight Games.
This is a nice way to fill out a single gaming session, but future One Knight Games based on the cycle racing theme are planned, so even if using this model of gaming you will have the option of returning to the track. There is also the potential to take it all a bit further. The game is cyberpunk in style so if you are playing anything of that genre, cycle racing at the Cylon track might be a popular spectator sport and you could use this ruleset to moderate races. If characters in your 'main' game want to get involved in racing, well, you might choose to use the plotline as well, and either adapting your regular ruleset or using this one for specific race-related matters as you see fit.