anyway, for the gyro.
If it would be of any help:
I have an R/C dirt bike. (from nikko RC, so RTD -> ready to drive )
And the gyro-system is quite simple:

It is simply a big piece of metal that turns a lot inside the back wheel in order to keep the bike straight. So an older gyro-system. For heli's at least. I guess for a dirt bike it is still pretty new. Works good to.
(don't know or this was what you where looking for)