A correctly assembled and setup bike only needs to accelerate to go in a straight line and be stable. Granted you have it pointed where you want when you start to accelerate.

I think the HH gyro would be good if you could teach it ( program it) to only control the steering servo only at the most extreme lean angles. To control the steering input when the bars start to touch down. As this is the most challenging aspect of RC-Bikes. Getting full lean from the bike without dragging the crash bar. This is especially true if you are running on a track with a big fast sweeper and some high speed direction changes and then several slow tight turns. Because you have to set your steering to respond quickly at high speed. This tends to make the bike (twitchy) or respond very quickly at low speed. It is a very fine line between steering input and throttle input to keep the bars off the ground and the bike at full lean thru every turn on a track. This is where a gyro might be helpful. But if it were helpful then that would probably be illegal in racing.