Center vent hole

They each have a cable adjuster

designated by the original Harley-Davidson OEM numbers: brake light switch 72004-39

It offers three positions—off

This includes what you need to make some nice

Motion Pro Chain Breaker for Motorcycle Chains - Heavy Duty Vendor_A&I Metal Finishing Center vent holeThis chromemoly steel chain breaker made by Motion Pro works on any 420 620 series chain, including the 530 chain that is common on many British and Japanese motorcycles. The design allows pin to be completely pushed out. Folding handle for easy storage. For a step by step tech article on shortening a chain for your bobber or chopper.