i need some help with my 200 Wr 400. it has has been sitting a while and i replaced the gas. when im ideling i grab the throttle and it dies even after its warmed up. also in any gear if im running it at high rpms in any gear it spits and sputters. any ideas? i took the carb apart and made sure the jets were clean and the diaphrams were working. i have never adjusted the valves but it ran fine the last time i rode it. is there any air ports that could get clogged by insects?