[trig123]

Originally Posted by KOZ45

I'm currently using the stock ezgo cable that is 6G

Positive Cable to the starter

https://gcartparts.com/product/6-gauge-wire-assembly-24

Should I upgrade the battery and positive cable?

Wouldn't be a bad idea to install a new 4 gauge though. Have your battery checked. You probably need one is my guess. The braided ground cable that came with your MPT 1200 is sort of small for your engine now. I might add one a little larger. I want to hear this thing run and watch it take off lol