I love my 15 tooth front sprocket. I also did the renthal ultra lows and a corbin seat. Some people complain that they can't keep the front wheel on the ground, but I have had no keeping it down. You just have to learn your bike and its abilities and breaking point.
I strongly recommend it, because its only 20 for a new front sprocket and you can always sell it on here.
Having a 15 on front can be a lot of fun. I had one on mine for about a year and a half. It makes your speedo way out to lunch but fun none the less. May be worth getting a speedo healer if you don't have one already.
Ya! Go for it. I put a 15 on mine a couple months ago and love it. Alot of fun to ride now not near as lazy. Anyway if you dont like it only a few minute job to put it back. The 17 might be good for a long trip or to save a bit on gas. But I'd rather go for the added acceleration.Good luck!!
I have also gone to the 15t in the front and it's a lot more fun. Second gear pulls like a train past city traffic. The speedo is off 8 mph at 60, so I don't take too big of a chance to push the speed over the posted limits. At least 80% of the time anyhow.
Also remember that changing the sperocket DOES mess with the odometer. I don't care that people say they checked it with their GPS or not. I have had a 15, 16 and a 17, they mess with the speedo and odo. Currently my gal has a 17 on, I have a 16 and our numbers don't match after a ride. I know different riders take different lines. Yes 1 or two miles, maybe even 5, certainly not 30 on a tank of fuel going through the prairies.
Went the long way around with that I'm running a 45 tooth rear planning on buying 15 front i will be testing as well. She scoots pretty nice with 16/45(2.8125:1) when I put a 15/45 (3:1) might put the front tire in the sky to often we'll see.