Hello all, i'm new to the board here and new to riding. I recently purchased a 2002 yamaha yz426f. When purchasing the bike, the previous owner told me it needed the standard carb cleaning and whatnot. After having a buddy at work rebuild and clean the carb, he's having an issue. After starting the bike and running it for a bit, the carb will leak gas out of the overflow on the bottom bowl when attempting a 2nd/warm start. He's confident he has all goods installed right and thinks the bottom bowl may be cracked from getting water in it and sitting over time. Does anyone know of any common issues with these carburetors? Any other possibilities besides the bowl being cracked? Last of all, are 2000 and 2001 carburetors compatible with this 2002 model? Thanks in advance for all the help!