[C&L golfcarts]

So I recently just got a 97 Yamaha g16 (gas of course) I honestly don’t know much about it’s previous owner besides a little shady work here and there. My issue is I have went through a couple starters and solenoids which I believe that to be they were off brand and cheap so I ordered new solenoid from buggies and a new starter as well. So when driving cart and it gets up to wot it cuts out and loses power then once it slows down a bit it will go back up almost like it’s surging.. it does have a new carburetor, fuel lines, fuel filter along with air filter and plug. I have searched all over and cannot find an answer to fix this.