W/E 29th July 2020


Note original Motoplat brown ignition coil (rubbish apparently)

Where does the time go?

Finally got back down the garage and put oil in Atlas #3 ready to have a go at starting it. I’ve been trickle charging the battery on and off and with two green lights on the Optimate time to rig up the fuel bottle and give it a go. The battery is a bit ‘secondhand’ as fully charged it’s giving 12.98 volts, a new one is over 13.

Anyways pressed the button and got a ‘click’ from the starter solenoid and that was it. A quick inspection showed the lead from the solenoid wasn’t attached to the starter…

Second attempt resulted in a spark near the engine mount by the exhaust collector and a blown fuse. Not sure why that happened but suspected that maybe the engine earth strap was shorting on the frame. Made sure the strap didn’t touch the frame (levered it with a screw driver…) and replaced the fuse but no power? Checked continuity on the earth strap and suspected poor contact on the engine which was fixed with a little emery paper work 🙂

Third attempt the engine spun over and backfired through the carb’ so I swopped plug leads over thinking maybe there were round the wrong way – more occasional backfiring so plugs out to check the spark. How many times have I done this in my life…


The blue wire in the ignition box should go to the outside terminal…

Left plug won’t spark so take off the plug cap and try and get a spark from just the HT lead – no joy. Swop coil wires about until I get the left to spark but not the right. A bit of head scratching until I wonder if the wires to the ignition box are correct. Lucky there’s a schematic on the box and sure enough the blue wire is where the black wire should be – two sparks 🙂

Inspecting the plugs made me wonder if fuel was getting through as they didn’t seem wet but anyway decided to give it another go. A few attempts and a fiddle with the choke and the unsilenced motor burst in to life. Sounded sweet – well to me but I’m not sure the neighbours would agree!


Ready for the road

So with the engine running ‘all’ that’s left is to fit the air filter tubes, sort out the rear brake master cylinder mounting, fit the silencer and body work and tidy up the wiring…oh and remove the clutch and replace the gear return spring and fit a clutch cable…oh yes and finally replace the alternator output cable sheathing and connect up the rectifier. Should be simple…

Nick 🙂

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