I just put 13 tooth countershaft sprocket on my bike with a 51 rear. sure changed all i get is wheelspin like mad? ride woods and trails mostly wondering what others use and like? gonna go walker valley next weekend will try out 13/51 hope I like it:ride:

i use 13/52 on a 05 450f. excellent for where i ride... the yz doesnt like lugging too much with high gearing...get all sorts of bad noises

What year is the bike? I ran 14/47 on my 04 and run 13/47 on my 08.

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