2004 Sportster with 2006 GSXR 750 motor installed

[GP@PPG]

OK, if you want help with it, we can help. I have done this before, but different. The same thing being these engines too liked to live around 9000+RPM, that being said your jet pump cannot be harnessed at that RPM range. You have the luxury of re-gearing it with different size chain and sprockets. Get the gear ratio aspect to keep the impeller shaft spinning UNDER 8500-8900RPM, THEN you'll have something that can be harnessed via the jet pump and a custom impeller. Trust this info, but try anything you like! We want to know how you did!! Very cool, fer sure!!!