This is a genuine RK Chain!!
This light-weight 'gold' racing chain was developed using the same advanced alloy materials and manufacturing technology as 520MXZ4. Both 420 and 428MXZ racing chains are the lightest and strongest in its class, giving you the best value-performance rating of any motocross racing chain in the world today.
Please double-check user manual for suitability.
This product was added to our catalog on Friday 03 October, 2008.