D.I.D VT2 520 X 120 Link Narrow X-Ring Motorcycle Chain520x120 VT2 Narrow X ring chain is designed to fit motocross bikes with limited clearance behind the counter shaft sprocket. Some models of Honda CRF's will not except a standard o ring chain with out rubbing the cases. X rings used in this chain keep dirt out and lubrication in for long lasting service. Suitable for MX Enduro bikes up to 500cc with limited clearance between the counter shaft sprocket and case requiring 520 chain 120 link and shorter.