They each have a cable adjuster

• Significant Power Boost: Dramatically improve your bike's electrical capabilities

This includes what you need to make some nice

Twin Carburetor Models (e

Got ignition troubles with your classic twin

Motion Pro Chain Breaker for Motorcycle Chains - Heavy Duty Vendor_A&I Metal Finishing They each have a cableThis 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.