The motor mounting is the same for the SXR as it is for the 650 and 750 Kawi motors. You can buy the conversion plate that the X2 guys use for a direct bolt in of a Superjet motor into a X2. Should work just fine with a SXR. You will also need the Kawi style coupler for the Yamaha motor so it is a direct transfer to the Kawi driveline. I am not sure who is presently selling it. I think Crab was the 1st to bring one to market. Contact him, he might be able to point you in the right direction. Otherwise, check the X2 forums.