what exactly is your deal?
thats a list i keep on my comp that i recieved from a friend of mine in oregon.. i own a tri-z and until today owned a 87 yz250 engine that bolted right into a tri-z so that cross reference is actually very helpful.. being that yamaha wants $26 per fiber plate for those machiens you don't just run to the dealer to buy a clutch.. and since most online companies have a year cutoff for showing part listings that chart comes in very handy too...
you obvisouly have some sort of superiority complex.. if your here to measure dicks i can assure you that you will lose.. your pro 4 stroke propaganda can go elsewhere because frankly I nor anyone else here wants to her it.. your negative attitude can go wayward with it as well.. it people like you that give the internet a bad name.. the only reason your inthis thread is to say how much faster your 450 is than a 125... well in that regard congrats... my advice to you is to get on your big bad 450 and ride over to a forum dedicated to 450f dirtbike where you can all be dislousinal together... and if you happen to run inot my cousin over there.. remind him his kx450F ain't sh*t compared to a 4mm banshee..