The Sunstar sprockets for the WR/YZ250F fit, but you need to use the countersunk head bolts. That's what I used on mine. If you like spending money, get the aluminum ones that last as long as a tire, if you're lucky. I have 4500 miles on the original chain and front sprocket, and about 2500 on the rear. I have only had to adjust the chain twice. I clean/lube it after every ride, and really clean it every fourth. (Keep in mind I use my WRR for off road riding, with only travel to and from the riding area on the road; no zipping around otherwise. So 4500 miles is quite a lot from that standpoint. Probably 75-80% off road.)
You can buy and buy for these, and most if not all of it is really good. Look at the spiffo-deluxe Zeta handguards that WCS sells. That Zeta stuff achieves the level of functional art. i have a number of Zeta things. Flatland makes the robust stuff that is blast proof, but Zeta makes the stuff you can sit and stare at for hours, all the while enjoying your favorite beer. ::003::
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