I dragrace streetbikes, so i know what kind of power it takes to run 9s. For about 1500 you can buy a gsxr 1100 motor and hit it with a 50 shot and run low 9s with a stretch on the bike, Let me know what kind of frame and stuff you plan on running!! I run a gsxr 1100 that runs mid 8s, and my dad is running a older gs 1500cc motor thats running 7s on spray