Together with TNK and Cyco, we found out that when using animations on bike, tapping doesn't work.
We spend some time to find bike riding animation ID and came up with idea to suggest a mode where You cant tap in bike races.
How would it work?
Mode detects when player is on motorcycle and forces him to use animation (/a 1311)
Animation looks like normal sitting on bike, but can't tap arrows for speeding up.
Try in /stunt, spawn NRG-500 or any other bike, get on it, and type /a 1311 0, this way Your skin will look like sitting on bike, but tapping wont work.
What Ya think about non-tapping moto races? Could be fun!