Hello everyone. I have a 2003 DS650 that stumbles and backfires when you give it more than 1/8 throttle. I have completely gone through the carb cleaned and replaced jets and airfilter. New plugs and oil changed out as well. Bike idles and cold starts perfectly. Will run under its own power from idle to 1/8 throttle once you pass that point it bucks, stumbles and backfires at the carb and through the exhaust. Anyone dealt with this issue and have a solution? I'm stumped at this point.