Ive got a mate that will fit/ balance them so can save that cost. Just though there might be sites that do decent deals similar to the car tyres.

Thanks for all the posts, I am going to buy two sets, I will put the 92's on for road and get another set of wheels and tyres for track use. How easy is it to release both wheels?

Providing you have a front and rear paddock stands you will be fine. if you are getting tyres for track use i would get some used pirelli supercorsers or the new bt003 (if you have a 17" rear?).

Very easy to remove wheels. 4 pinch bolts and an axle nut for the front wheel and one big nut for the rear. Gotta love the single swinger...