Hey, so I was looking around the ol internet for trike parts and found that Kustom Kraft does 452cc big bore kits for the atc 350x. I was hoping to get some more info on this as I’m curious as to what they do to the motor itself. I’ve heard rumors that the stock 350 head needs some serious boring and porting as well as crankcase boring done at a machine shop. I was also curious as tho the compression ratio with the big bore kit. All info helps out, I’m already planning on swapping to a 400ex carb to help with the throttle response, but what all do I need to do or get done to the motor for the big bore kit besides what KK does to it?