I have a 99 YZ400. Bike was running pretty bad the other day so I tore the carb down, and found I had a cracked throttle valve plate, and the gasket was in pieces. Got the new parts in got it back together, now it will not start. It will fire put will not start. I can only think maybe I put the gasket on the valve plate on wrong. Not 100% sure where it goes or what direction it faces. Any hlep would be great. Right now I have it on the back side of the round flange, that sits in the cart. It seemed like the most likely spot.