i,m in the process of dropping a 1999 800 xcr motor into my 1996 xlt. wiring looks to be no problem once i get the cdi box. pipes, i have aset of pipes of a 2000 xcr and the carbs lined up, not 100% sure how the pipes will fit, the torque stop plate needs to be shifted around a bit but should work. i've got the motor sitting in the sled on the xlt 600 straps the motor is about 1/2 inch out favoring the clutch side from lining up with the secondary compared to the original 600 motor. not sure if the secondary can be shimmed that much or i will just drill new holes in the straps to compensate for the 1/2 inch or differnt straps will work better for me. i heard straps off a 680 ultra will work, not sure though. the bolt for the primary clutch is bigger on the 800 motor though. might have to find a primary and the bolt of 800. i will figure the rest of the clutching and gearing out once i get it running. any ideas on this project, let me know thanks.