HT lead

Looked as if someone had pulled out the HT lead, actually.'

Power mosfets exhibit no secondary breakdown and can be avalanched to clamp excessive overvoltage due to leakage inductance or a disconnected HT lead.

Unlike the multi-cylinder systems noted above (which fire two plugs simultaneously from a double-ended coil) the coil in this system has only a single HT lead running to the single plug.

The J series sported a couple of modernisations including a 180 section rear tyre, second headlight, uprated generator and stick coils (coil on plug) replacing the traditional coil with HT lead.