You can run the 650 electrics if you drill/tap/clearence the cases for the 650 stator. Be warned the rev limiter is lower on the 650 compared to the 750.
If you google Group K + Kawasaki there is a bunch of articles on the Kawie port layouts. Basically everyone says the small pins made the most low end. the 98 SXi Pro is more mid to top end engine though. I know someone who had one with a dry pipe. When they came out with the 800, they lowered the exhaust ports.
I have a pic of a dry pipe in an X2, they had to clerance the hull to make it work. I will try and find the pic, it may be at home. I want to try and use the 750 dry pipe manifold, but use a Yamaha chamber of sorts. If that doesn't work... Blowsion sells an adapter plate that mounts to the Kawie cylinder and then lets you use a yamaha manifold.
As far as the pump swap goes... the 750 pump will bolt right in. However you will need to use a 750 SX intake grate. It will need cut and rewelded shorter though. Or you can weld a piece of metal to a 650 grate to make it longer. It needs the "T" looking piece like a 750 grate has.
Then you will need to make a pump shoe or cut one off of a 650 pump. I plan to chop one off of a junk 650 pump. Then perhaps make a mold and make one out of fiberglass. I have seen threads on PWCT where others have used a metal 750 pump shoe, I believe a 750 SS or STS has one stock. Then it must be milled or grinded down to fit right.
The last easiest part is that teh X2 ride plate needs to be notched for clearance aroudn the "T" piece of metal on teh intake grate.
I plan to use a 750 pump, TBM stuffer, and a mag prop in my X2 build that keeps getting delayed...
Any more ??? just ask, you already have two X2 guru's watching the thread in Crab and Shawn.
