I need to buy a new rear sprocket for my YZ426, and I've seen a couple of on-line places offer "JT" Sprockets. They are steel sprockets and run anywhere from $19-$25 dollars. Are they good, junk or indifferent ?? I have never heard of this brand before. I'm looking for durability not light weight or anything special. The price is attractive compared to a Renthal at $49, and Sunstar which is a special order for the number of teeth I'm looking for.