To install the sxr prop, you simply remove the old 140mm kawi prop, if you have one in the donor pump. then thread the sxr prop onto the shaft, youll want to check your pump bearings and seals. in order for the sxr prop to fit into the pump without any clearance issues, you want to have approx 5mm cut back (off ) the rear or the prop hub, this is at the back behind the blades. At this point all will work just fine. if you want to bump performance up another notch. find a R&D afterburner or blowsion/TBM core sleeve. this will increase your hub section inside the pump to approx 74mm. The sxr prop has a 75mm clearance. But in order for all this to work, you will need a spacer made up to fit the sx/x2 pump. RadDudes sells them.
Then all bolts together, easy peasy.
If you have a sxr prop and need it cut back quickly and low cost. PM
@speedysprocket . He can take care of it
Raddudes sleeve adapter:
http://www.raddudesfi.com/raddudesfi.com/Part_-_Afterburner_pump_cone_650_pump_adapter.html