been searching high and low cant find one there is for dirt bikes.but im not sure if they will fit.

Seems lowest one i can find is 13 before i start buying and returning them i would rather ask around see if anybody has found one or not

 

If some one made it, it would be on rockymountainatv.com 13 is the smallest front sprocket they make. You can go from a 38 tooth rear sprocket to a 40 tooth sprocket and and swap the 14 tooth front sprocket for a 13 tooth and get the same result as going to a 12 tooth front.

 

i dont think they make them. if you want one it will have to be custom made. just wondering why you want to go so low? with the ammount of bottom end tourqe it makes.

 

where i ride top of 5th is useless there is no where around me to run that fast

goin to a 13/40 from the 14/38 stock

 

I would put the 13 tooth sprocket on first and run it before you buy the 40 tooth rear. You may need to get a little longer chain as well to run that 40 tooth sprocket. Just something to think about.

 

yea bought a sprocket set w/ chain if all fails ill have a 13/14 front and 38/40 rear w/ 2 chains so ill have a few different setups i can do

 

i bought a 13 front for mine a couple months ago and it made a BIG difference in acceleration. i have since changed it back to 14, i like the top speed more than acceleration. don't worry about the rear til you try the 13 front first...a Renthal front is only $25, i bought a 36 rear and it cost almost $70...not a hard choice.

 

over 70 on a atv around where i ride is nuts, we had another death in st joe park atv hit dirtbike

but stock gear in 660 is a 3.15, a yfz450, predator, 450r and 700r is 2.71 ltr450 is 2.57 a trx450 is2.71 or 2.92