Hi guys I'm the original owner of m 02 426. I just tore the bike down to the frame and rebuilt the top end (engine is my concern for this thread). We've inspected the valves and they are within tolerance, and the bike gets plenty of compression. The carburator is clean, and we're getting a good spark from the plug. The problem is, I have to make the following sequence to get the bike to fire up cold: 2 twists of throttle open hot start kick 2-3 times. When engine fires, immediately ramp RPM's to maintain idle run for 30 seconds. close hot start. open choke. Now the bike idles normally with the choke open When I close the choke, its like I've turned the gas off. The bike immeidately dies. Its somewhat strange since we did not need to make any adjustments to valves, or carburation after the bike was reabuilt since it ran OK before. Any advice is appriciated.