520 x Number of Links (Plates) DID drive chain for your motorcycle with 520 pitch sprockets. We strongly recommend you consult with your owners manual or service manual and find out just what is the recommended chain length, pitch, type & grade to use on your motorbike. DID are world class leaders when it comes to specification, strength, reliabilty & high mileage in chains. If you want the best for your machine, go for a DID chain. Often found fitted as original manufacturers equipment.