A couple months ago my blaster was reving up reallllll high!! it was like the throttle was wide open at times and when you would pull the clutch all the way in it would begin to rev up also! So i took it and the guy adjusted the carb. and it was running perfect and not revin up, today i get on it and each time i pull the clutch in it revs up! but if i like only pull it half way in it wouldnt do it! And also when i pull the clutch all the way in i have to hold the brake or it tries to pull off!????? Help me please! sorry soo long ahaha