I spruced this late 60s sears roper up that I scored for next to nothing on CL. After messing around with lots of different engines and carbs I landed on the predator 212 and lots off upgrades. Billet flywheel, upgraded valve springs, Billet crank arm, autolite spark plug and a real mikuni vm22 carb, I messed around with the knock off that all the popular go.kart sites sell but couldn't get it dialed in, not even close. Anyhow.. Long story long I put the new real mikuni on yesterday and it fired right up much to my surprise. Took it for a ride, the first time in almost five years of having this thing, and got home with a grin on my face. Loads of power and torque. Turned it off and later tried to start it, plug was foul, and I mean soaking wet. Aired the plug out and checked the numbers on the Jets, pilot was 30(!) and main 100. Obviously 30 was too high, lowest I had laying around was 17.5 pilot so I popped that in and it fired right up. Turned it off and same issue, wouldn't start again and the plug was wet though not as bad. I have pilots size 15, 12.5 and 10 on the way but I'm curious is there anything else I should be thinking of? Haven't touched this engine in four years so I changed oil and plug. Couldn't tell you what the valve lash is set at but I do remember setting it. Also I know the carb float isn't too high cause the carb isn't pissing fuel. Appreciate any help here.