I put a 13 on mine and took it off the next day..makes 1st gear usless and revs through the powerband to quick....u might like it though....its quick on take off ,,if u can keep the front down through 4th

 

the 700r gearing is different than the 660, most are going to a 15t, read the forums at raptorforums.com

 

After you change your sprocket have someone check your top end with either a radar gun or a GPS. My top end this past weekend on my completely stock engine 06, 700R was 73.4 MPH using a GPS on a Dry Lake bed. I was wearing all my riding gear and my weight is 195 lbs. For trail riding stock is fine for me. 2nd gear is plenty and I only dabble with 3rd gear for very short sprints. A smaller sprocket is going to really help you in a drag race but you'll be running up the RPM's quickly. Like chip700r said, "Makes 1st gear useless." Report back to us when you make the change. Let us know how you like it. Good luck.

 

Yes, you can use the stock chain.

 

i think im just goin to go up one in the rear i just want a little change.. thanks

 

1 down on the front on a 660 makes for great gearing..u pick up take off but dont really lose much top end.....the gearing on a 700 is totally different.1 down in front on a 700 didnt work for me

 

I downed my rappy to a 13 tooth for harescrambles. I love it. It is super torquey but i love having the snap. I dont run as fast but i can get there just as fast or faster than the 450s.

 

Go down one tooth in front. It's cheap to replace the front sprocket. I wouldn't go down more than one tho. The diameter gets too small for the chain and wears fast.
One tooth in front should be like 3-4 in back.