I have a 2005 club car ds gas powered with a 6 inch lift kit and 23 inch tires. i have the governor zip tied, but the cart just keeps getting lower and lower on power. it can bearly climb a little hill anymore. It has 149 psi compression, just put on a new drive belt, new fuel pump, new air filter, fuel filters, spark plug, muffler, and did a valve adjust. and nothing is helping. any ideas? could it be the drive clutch? how do i check it?