I am currently running 13f/49r sprockets and was wonderin if that was standard. I have a 2007 yz450f, i mainly ride sand tracks with lots of tight 2nd gear corners any suggestions on wat sprockets to use if it makes any difference???

i believe that is stock gearing id try bumping it up 1 or 2 teeth in the rear. ive used renthal sprockets they dont do too bad with a regina chain.

I went 13/50. Great combination! If you go more than that you'll find yourself shifting a lot. Unless you're on a short tight track, then go to a 13/52 ect. Goodluck!

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