If the bone stock 03 bike engine is 45HP Which seems to be what the bike guys are saying That’s with the OEM Honda pipe. I got my pipe from Mike at Shark Shifter (Knowledgeable helpful guy). Lets assume the kart pipe has no effect on HP. I ran the kart all stock before doing any mods and I don’t have any way of knowing for sure but I think the carb and RAD valve probably added a good 5HP the difference was dramatic. If that’s true then it’s putting out around 50 HP.
I should probably think about getting rid of the power valves and going with Ian’s ignition system.