Selling a brand new genuine RK O-Ring chain, suit CBR250RR, I was after a non O Ring HD chain for race bike but due to a failure to communicate with my local bike shop I got "persuaded" to purchase this one. Perfect if you're looking to fit a 54 tooth rear sprocket to gear down for improved low down drive. Asking $90 + postage, pick up Birkdale. They sell for $120 + postage on ebay http://r.ebay.com/L0p8v7