Motocross and Trial have much the same movements on motorcycles and can use a program that not only enhances the ability to ride harder, faster, and compete, but also has an injury potential factor that in itself adds a great benefit.
It is not just the strength you need to ride that most people think about, but “what” the strength can be converted to.
This is all called Periodization of Training
I always laugh when I see people talking about strength training for the abs. Why you ask? For some reason they think the abdominal muscles are made of a different muscle than every other muscle in the body. Maybe you have fast twitch-slow twitch and abominal twitch. Here are two videos that should make you think abut what you have missed by all this fancy abdominal training the media feeds you.