(wr 450f 2004) i was riding along in 4th then i knocked it up into 5th and as i accelerated, the engine just reved up! if i touch the throttle gently then i can feel that it is in 5th but as soon as i try to accelerate even a tiny bit the engine just revs up. i've been reading some posts on here and it seems to be a problem with wr 450's around the age of mine. apparently there's 3 parts i need to fix the problem, does anyone know what these parts are? and also why they broke in the first place? thanks for reading.