I'm working on a 1997 EZGO 4 stoke gas cart. Its got a lift kit with 22" tires and a utility bed on the back. It's a co-workers. He says it's low on power when it gets hot. I did a compression check and it had 190 and 195 on the cylinders. I did a tune-up kit and adjusted the valves to .005". I installed a new belt. The owner is close to 350lbs and hauls firewood on the back, and also has pulled a heavy trailer from time to time. I'm thinking the clutch might have something to do with it. You have to give it a lot of gas before it jerks into gear. It will actually chirp the tires on gravel. Any help is appreciated.