Thanks for the reply, Mike. I heard everything from 3mm setback to 8mm setback when using the SXR800 prop in a 650 pump. Did you have your SXR800 prop repitched at all or is it completely stock? I think I remember reading that @Big Kahuna said the stock SXR prop was manufactured by Skat Trak for Kawasaki somewhere here on the site and it's a pretty high quality prop. I'm excited to see how that prop does in my FX1 with the Kawi 140mm pump swap after I get my 61x bored and ported and add the Factory B pipe, ADA head with 35cc domes, MSD enhancer, Wet Jet intake manifold, and 46mm Mikuni.Yes sir, stock SXR 800, set back 3mm. I tried a bunch of different props, solas and skats, whatever the flavor of the day was at the time (concords , skat swirls, different hub sizes) and pretty much always came back to the stocker SXR. Worked best for all around riding, surf , ripping across the bay, creeks. Seemed to me to be a higher quality prop, material wise.