My brother just purchased a 1998 YZ 400 from one of our riding buddies. Let me tell you a liitle about the bike. It was ridden the last time in November, before he got his new bike. The bike has not been abused. Just before it was parked he had the dealer check the valves and adjust them. It was stored in a shop, it just had not been started all winter. Which brings me to my problem. So far I have not been able to get it to start. The previous owner and I tried to start it for about twenty minutes but no luck. We drained the gas and pulled the bolt on the bottom of the carb off to make sure there wasn't trash in it, and replaced the spark plug before we even attempted to start it. After our legs gave out I pulled the airbox off and looked in the carb and gave the throttle a twist and it is pumping gas in a steady stream. As he has not had a problem before staring it, the start procedure is not the problem, so my question is am I missing something? I am fairly new to 4 strokes so any advice would be appreciated. I have not tried to start it since I pulled the airbox to see if it was pumping gas. Is it possible that it is just going to take a while to crank it since it hasn't been started in a while?