Richard Dodds has a Canadian Spec MK3 Commando, but has made some modifications to it inline with modern motoring and reliability.
First up, Richard has fitted a Tri-Spark electronic ignition to his bike – this is a great pairing for a MK3, as the circuitry really minimises kickbacks, so it is much kinder on that delicate sprag clutch!
You can find the Tri-Spark website here.
The Tri-Spark unit is a one box solution – all the gubbins are mounted inside the points cover – no additional black box to try and hide under the tank, and very very simple to connect up.
The wiring is as follows:
- Red wire – this is the positive feed to the Tri-Spark unit. Most people attach this wire to one of the two fixing posts inside the points cover. I would personally recommend running an additional wire up to the coils and have drawn it this way on the wiring diagram.
- Black/Yellow – this is the negative feed to the Tri-Spark unit. This joins in to the White/Yellow that is the kill switch on your right side handlebar switch (the Ballast resistor is no longer required)
- Black/White – this is the negative supply FROM the Tri-Spark TO the coil.
You’ll note in the wiring diagrams below that the Ballast Resistor and Condensers have been removed as part of the conversion to Electronic Ignition.
Two major benefits of the Tri-Spark:
- a very low operating voltage – as low as 8 volts means your bike will still run with a less than optimal battery and charging system
- circuitry performs the electronic equivalent of advance and retard to make the bike easier to start and stop the possibility of kick-back. This makes it gentler on your knees, and kinder to electric start systems (aka the delicate Commando sprag clutch)
In lieu of the twin 6 volt coils, Richard has fitted the dual output single tower coil from Colorado Norton Works (it’s the brilliant Crane Cams unit) and looks much neater.
He has also fitted a 3 phase Lucas alternator – a nice choice for superior charging in modern traffic conditions.
To go with the three phase Stator, Richard has fitted a Podtronics 3 phase regulator/rectifier in lieu of the half wave rectifier and twin zener diodes of the MK3.
This will bring the voltage up a little too!
Richard has fitted a SparkBright voltage monitor instead of running with the standard warning light assimilator.
Custom Norton Commando Wiring Diagram – Richard Dodds PNG 3066×1841