Thanks Jim, It didnt, I got that far...the driven is a solid sprocket. Ended up going to a kart place I found here in Nashville. You'd not believe this place Looks like a rathole from the front...go inside and theres a 20,000 square foot warehouse with literally thousands of bikes and karts. The owner (ex army pilot, calls himself Major Tom) looked at the set-up and explained that it wouldn't work with the predator engine. As it happens, he needed to go buy three of those this week, so he gave me full credit for the new one. I have the 5hp Briggs. I swapped him the new engine for a new centrifugal clutch (a max-torque...please tell me its not a P.O.S.) and a 70 tooth driven sprocket. +10 bucks. So, now Im removing everything back there and changing out the sprocket. I believe that will also give me a far better ratio for the little guy. If we did the math right it should be right around 6:1 in the end (those big tires on the back). Now...any decent links for a manual on getting this shaft out. all kinds of set screws. Im not sure what has to be removed from the drive side but it looks to me like the wheel (done...wow what fun that was) the set screws on the brake, the driven sprocket and I should be able to slide it out to the right. Correct? BTW, you guys have been a Godsend. Thanks a lot. Leo