Recently purchased Kandi 125cc go kart. Starter only turns once or twice. Brand new battery and starter as well. If I pull the spark plug it spins fine.

 

Check the leads from battery to solenoid, to starter, are clean and tight, make sure the new battery is fully charged. Check earths on battery, frame and engine too.

 

All wiring is good. It started fine over the weekend when I was trying to get the carb cleaned. Just didn't run. I turned it over probably 100 times it seems. It progressively got worse. I thought the starter may have just overheated, so I replaced it and the battery with no change. I've tried hooking power directly to the starter to bypass leads

 

Got it going. The sleeve in the carb was backwards, so wide open on start, the other carb had a stuck float flooding it as well before. Once I hooked a jump box to it, it had no choice but to turn over then revved up. Starts and runs fine now. My electrical issue in the other post was a bad ignition switch.