Cannonball

CANNONBALL STEALTHSTARTER AND SPECIALTY PARTS FOR HARLEY-DAVIDSON BIG TWINS

Cannonball makes one of the most sought-after solutions in the vintage Harley world: a hidden electric start conversion for 4-speed Big Twins that keeps the kick starter in place and the original appearance intact. The Stealthstarter is the centerpiece of the Cannonball lineup, alongside transmission hardware, a heavy duty kickstarter kit, and a disc brake conversion for springer front ends.

THE STEALTHSTARTER ELECTRIC START CONVERSION

A kickstart-only Panhead, Shovelhead, or vintage Big Twin is a commitment. Every start is a physical transaction. The Cannonball Stealthstarter changes that without changing what the bike looks like doing it:

• How It Works: The Stealthstarter kit bolts directly between the kicker cover and the transmission case. At only 19mm wide, the system has a low enough profile that the overall appearance of the motorcycle is virtually unchanged after installation. The primary drive, primary housing, and oil tank stay untouched.

• Kickstarter Stays: The stock kick starter is retained. The bike can still be kicked, which matters for builders who want the convenience of a button start without losing the option or the aesthetic of the kicker pedal.

• Two Frame Configurations: Separate kits cover rigid frame applications and swingarm frame 4-speed Big Twins from 1958 to 1985. Order the correct version for your specific frame configuration.

• Accessories and Spares: Extended throwout bearings (two versions covering pre-1975 and 1975 to 1984 applications), extended clutch release levers for 1936 to 1964 Big Twins, extended crossover shafts, and fender inserts are stocked for builders completing the full conversion or replacing worn Stealthstarter components.

Installation requires comfort with vintage Harley drivetrain work. If the skill level is not there, a shop that specializes in vintage Big Twins is the correct call before pulling the primary cover. Browse motorcycle starters for the full starter range alongside Cannonball kits.

TRANSMISSION AND BRAKE HARDWARE

• Heavy Duty Kickstarter Kit (1985 to 1998 5-Speed Big Twin): For builders who want a more robust kickstarter setup on 5-speed Big Twins where the stock kicker is a maintenance point.

• Transmission Base Plate and Adjuster: Cannonball's transmission base plate and custom adjuster for 1936 to 1985 4-speed Harley-Davidson Big Twins, used in custom drivetrain and transmission mounting applications.

• Springbrake Disc Brake Kit: A disc brake conversion kit for I-beam and classic springer front ends with the 1978 to 1999 narrow dual flange front hub. Running a springer and wanting disc brakes is a fitment challenge most builders solve with fabricated brackets. The Springbrake kit is a purpose-built solution for that specific front end configuration.