Hi everyone, this is my first post on here. I just bought a Yamaha yz426f at auction and it didn't start when I bought it. It's my first 4 stroke. I rebuilt the carb this weekend, put in a new spark plug (it's got spark). New air filter as well. It didn't have much fuel in it when I got it so I drained what was in it and put fresh stuff in. I've kicked this thing so many times I lost count. Even tried bump starting. Any ideas??? I'm gonna play with the fuel screw tomorrow night. I think it could be in to much. Would that cause it to not start? Let me know what you guys think. Thank you.