I have a 2003 TW200 and when I first got it, it would start and run fine every time. I changed the battery out and used the Yuasa that is spec'd. It will start and idle but when I give it gas it dies. After a while of it dying and restarting I can give it throttle and get going. After riding for a few minutes it idles and acts fine. It has me puzzled. I cleaned the carb and the Pilot Jet was gunked up. I used some wire from a wire brush to poke through there. I didn't want to make too big of a hole. I cleaned the tank as it was nasty as well. I am wondering if after I cleaned the tank some trash some how has gotten back in there. Should I just go ahead and change out the pilot jet and if so, is there any other jets I need to address? Also, could it be the spark plug?