For what it's worth, I had a 15t put on my '12 today and it fits fine.

 

hay brieninsac, got the same bike a few days ago. can i pick ur brain for some help? the mods that u did, did u do yourself? also the sprocket change u did how is the performance differ from the stock set up? ive read a few older posts and it seems a lot of ppl like the 13t on the front any comments on that would be great. also where did u order your parts from? i appreciate all ur help!

 

Ah that makes sense, so the 1212-0073 should be for the 06-08s

 

I did all the mods myself except for the front sprocket. I couldn't get it off. So when I took my bike in last week for it's 600 mile service I had them put it on then. I bought a JT sprocket on eBay for $20 with shipping.

Contrary to others who have gone down to a 13t for off-road riding, I wanted to go up to a 15t for road riding since that's what I do most of the time. Granted I haven't done any major off-road riding since I put it on, but so far I think the torque will meet my needs for both.