| Diagram | Fig. 6 — TIMING COVER, CONTACT BREAKER AND COILS · ref 11 |
| Subsystem | engine bottom |
| Listed in parts books | 1964–1966 |
CONTACT BREAKER, type 4CA
Lucas 4CA contact breaker (points) for the timing cover ignition setup, cataloged 1964-1966.
This is a Lucas 4CA contact breaker, the points assembly that lives behind the timing cover and fires the ignition. It appears in the parts books under the TIMING COVER, CONTACT BREAKER AND COILS and TIMING COVER AND CONTACT BREAKER figures, which is exactly where you'd expect to find it on the front of the motor.
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The 4CA is a twin-cylinder points unit, opening and closing to trigger the coil at the right moment in the ignition cycle. Catalog listings for this number run from 1964 to 1966, so if you're chasing one for a bike outside that span, check your own parts book or give us a call to confirm the number matches what your timing cover wants.
We don't have more detail on this one beyond the catalog listing itself. If you're unsure whether this is the right points set for your machine, bring in the old unit or the part number off your timing cover and we'll match it up.
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