Still chasing this issue on my 98 TW200. Today it started right up and rode well. Occasionally at a stop sign it would stall out but it would fire right back up. After about 15 minutes of riding it bogged out and wouldn't restart so I pushed it home. When the bike died the battery was dead, when I started riding it the battery had a charge in it. When I got home I gave it a shot of starting fluid and it fired right up until it burned it away then it shut back off. It seems like a fueling issue but my carb was professionally rebuilt already. Then today I swapped on a brand new carb and it's still having the same issue. Petcock was flowing, I pulled the line and it had a steady flow to it. I've been chasing this problem for a while and don't know where to go from here. It really seems like it's a fueling issue since the ether made it fire but I think it's weak spark and the ether can ignite it when the gasoline can't any ideas?