Re: New to the forum
Never grind aluminum! Always cut it with a rotary bit or a file. WD-40 is crap (kerosene and water). Use PB Blaster instead. I was referring to a stock carb and intake. If you look inside of the output side of the carb, it has slots to facilitate clamping the carb onto the intake. Those slots are what to fill with the compressible caulking/sealant. On real motorcycles the carb slides INTO a rubber boot. Much better air flow that way, but with these the manifold buts up to a flange inside the carb so there won't be much turbulence there.
Of course you probably don't have your kit yet so you can't look at that yet.