OFFRAMP OMTT Magneto Ignition for 1971-1981 Harley XL Sportster

Built for riders and builders who believe a Harley should be as mechanical as it looks, the OFFRAMP OMTT Magneto Ignition brings true self-contained magneto ignition to classic XL Sportster builds. Instead of relying on battery power to generate spark, the magneto produces its own ignition energy—making it an ideal foundation for stripped-down choppers, bobbers, and vintage-inspired customs where simplicity, reliability, and clean wiring matter.

The OMTT is driven through the factory tachometer drive location and combines manual retard for easier starting with automatic ignition advance once the engine is running. A precision-machined billet aluminum body, polished mechanical finish, and compact traditional magneto architecture give it the appearance of a period-correct race component while delivering a more refined solution for modern custom builds. Multiple mounting orientations also give builders greater flexibility when working around frame, control, and engine-clearance requirements.

Product Features

• True Self-Contained Magneto Ignition – Generates its own ignition energy without relying on battery power for spark, helping simplify electrical systems on stripped-down custom builds.
• Manual Retard / Automatic Advance – Retard the ignition for easier, more controlled starting, then allow timing to advance automatically during normal engine operation.
• Stock Tach Drive Installation – Mechanically driven through the factory tachometer drive location on compatible XL Sportster applications.
• Precision-Machined Billet Aluminum Construction – CNC-machined aluminum architecture delivers strength, dimensional accuracy, and the unmistakable appearance of a purpose-built mechanical ignition.
• Rare-Earth Magnet Ignition Architecture – Designed around a high-energy permanent-magnet rotor system for consistent magneto ignition output.
• Multiple Mounting Positions – Supports rear-facing, straight-out, and intermediate angled positioning to suit different custom layouts and clearance requirements.
• Clean Chopper & Bobber Packaging – Eliminating battery dependency from the ignition circuit helps reduce unnecessary wiring and supports the stripped-down appearance traditional custom builders demand.
• Classic Mechanical Character – A polished billet body, exposed hardware, and traditional magneto proportions deliver a period-inspired look that belongs on vintage-style Sportsters and purpose-built customs.