AFAM Chain Kit 520MR2 13 51 Standard Ultra Light Rear Sprocket Machined with great precision in Machined with great precision in a light and durable 7075 T6 aluminum RFX Factory Kit Husqvarna (Magura) TX125 18 19 TE150 20 21 TE250 300I 18 21 FE250 350 450 501 18 21