So far I've got a motorcycle attached and acting like a real motorcycle. Which means it tips over.

How can I prevent this? I've uppsed the mass of both wheels to 1000 and given the bike a mass of 1, and this helps some, but tips slower, and not much slower.

I've considered the idea of an invisble entity that would only allow the bike to tip so far, but I want to leave this as a last resort.

Any help is appericated.