The quality of the JT Sprocket is noticible. This Sprocket fit my 2011 KTM 990 ADV R like a dream. I went from a 42 tooth to the 45 tooth rear sprocket and replaced the 16t counter-shaft sproket with a JT sprokets 16t . The new sprocket fit on original 118t chain but shortly after I replaced the OEM chain with a gold DID ZVMX chain. It all works great together. The new 45t on the rear provides a better offroad gearing for when the terrain gets technical and still has plenty of highway speed performance.
I use chain wax on my sprockets and keep them well cleaned and maintained, but this one still picked up some rust faster than others I've used. Nothing major, though. Makes the wheels spin, hard to beat for that.
Needed to gear down for mountain dual sport riding - and this worked perfectly - 1st gear is too fast for backcountry on a DR650 otherwise. this is a typical item found in any store, so always like to get it from RMATV with my other stuff. The only problem is that it doesn't come with the external mounting plate required to house the 3 bolts and the gear - have to reuse the OEM plate and because the gear is smaller - you will have to grind off 3-5 mm of the old mounting plate and throw out the rubber O-ring. (Not good if you want to put your old 15 tooth back on later). I wish RMATV would sell the right size mounting plate! They state to just use the old plate as is, but don't! Your chain will be riding on the plate and be severely damaged. I ground off the edge and used the OEM plate anyway and it does work. Be certain to use griplock on the bolts. - plates are available on other websites related to dual sport riding and the DR650, but I had to get it on the road. Will have to order both plates now.
There's no bling factor here, but when you're running a high mileage touring machine what I'm looking for is inexpensive, effective and reliable. JT steel sprockets fit the bill for me, and have for 80,000 miles.
Machine this part was bought for: 2006 KAWASAKI 650R Ninja
Fit was perfect. Finish was plain, but complete and unmarred. In 5k miles, it has shown no signs of wear in my constantly gritty desert environment. More durable than my OEM sprocket. Less pretty than my OEM sprocket.
Sunstar sprockets are quite a bit better quality in terms of run out and having a hand finished edge, instead of just the stamping. But for about 1/2 the price, if you don't log on lots of miles or are planning on selling in the near future, these will do the job.