That 1100 engine is one of the strongest bottom ends to be installed in a stock bike. Unmodded, with a little care, they will last literally forever. Even with a lot of mods, the bottom end will hold a LOT of power. The early stock engines put 100hp out, and a free breathing engine with cams and top end work can get close to 130 very reliable horsies.
Bolt it into a lightweight, but stiff, chassis and while it won't run with the 200hp+ crowd, it would be a VERY fun bike to own.