Big Seven Ignition System

The Big Seven is fitted with a DK4A Lucas distributor with 8deg auto-advance.  Sparking Plugs are Champion L86C or NGK equivalent with gap 0.022 - 0.025".

B7 Ign 1

B7 Ign 2

B7 Ign 3

B7 Ign 4

See also:

How it Works - Ignition Coil

Ignition OK?

Tracing & Rectification of Ignition Troubles