Also.. dont forget to get a better pipe. A good motor will run like crap with a bad pipe installed.

You might wanna Check out www.novarossi.com and maybe www.rbproducts.com (for their pipes).

Novarossi makes some fairly insane engines!

Also.. please remember that HP is NOT everything!! There is no standard for testing, and on top of that these numbers say nothing about torque.

I would weight peoples opinions, reviews and experiences over the plain numbers alone.
Also, price says a lot about the quality of the engine!

Hope that helps
ram