i recently bought a 2000 rm 250 which is in mint condition however the carb is fighting me it starts first kick everytime however when you get on the throttle it begins to miss through 4th gear ,i was told to reseat the jet gently then back it out one half turn ride it if no improvement continue to back it out an8th of a turn at a time until problem is corrected can someone please help me ive cleaned the air filter etc however just cant get it right, im in the doghouse w the wife she didnt wanna spend the money not alot of peace in house