Ok 96 KLF300 4x4, i got it running rebored jug new piston new seats and valves. when it starts it takes a little bit for it to start but when it does no problem. I can give it as much throttle as i want but once i put it into gear it will move a few feet and then stall out. Any thoughts once i get this issue figured out its golden!

 

Takes more gas to move then it does to rev up. You had said in your earlierpost it had sat awhile. Sounds like you need to remove the bowel off the carb, probly has trash in it. Make sure to remove the 2 brass orpheus and clean. A single strand from a small cable works good for cleaning these tiny holes.