CB750 Dunstall is on the way back
After years of inactivity, my CB750 Dunstall is finally starting to feel the fruits of my labour. Having languished while I stockpiled parts, the process of rebirth has commenced.
The first problem was ignition, or – more accurately – the complete lack thereof. With no keys for the cut and bodged ignition switch, and no ignition or points plate behind the engine cover, all mixed with a bird’s nest explosion of disconnected wiring – there was no chance of assessing just how electronically challenged the Dunny really was.
So I sourced a new old stock ignition barrel from Thailand, a back-plate, points and ignition timing plate from the States, and a new electronic ignition kit from Frank Wrathall Developments (www.fwdevelopments.com), and set to work. With the new ignition fitted, I started trying to connect the switchgear, clocks, and main loom together – with limited success. The switchgear wiring didn’t match the loom, and no amount of staring at a wiring diagram could unravel the labyrinthine mass of wires. Trial and error, and a multimeter, got me most of the way though – and with a battery connected I eventually saw the idiot lights come alive, while prodding the starter button actually resulted in action in the bowels of the engine. It’s alive. Well, sort of.
The loom was a mess though, and logic dictated that it had to go. With a brand new replacement bought from David Silver Spares, I carefully swapped old for new. The switchgear wiring was equally badgered, and the lefthand switchgear was also broken. With new ones bought I was in a new world of electrical cleanliness.
Now all I needed to do was sort out the fuel system and see if it would spring into life after decades of inactivity.