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by paul.jameson
Sat Sep 14, 2019 8:23 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5009

Re: 1948 Iron 4G Coil Ignition

The distributor drive is a potential source of problems on the 4G (and 4F 1936 and 1939). The fibre gear on the magneto shaft which drives the dynamo and distributor will shear its teeth off without warning which loses the drive to the distributor and stops the engine. To check for stripped teeth, t...
by paul.jameson
Fri Sep 13, 2019 8:26 pm
Forum: Main Chat Forum
Topic: Does this seat use the lycette springs
Replies: 10
Views: 443

Re: Does this seat use the lycette springs

Go to your local caravan supplies shop, or Ebay. Purchase a length of bungee cord - say 2m. Where the slots are on the seat frame, run a drill through to suit your bungee cord. Make up the wire hooks for the front from old fencing wire or similar. Tie a knot in the end of your bungee cord, then run ...
by paul.jameson
Thu Sep 05, 2019 8:17 am
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5009

Re: 1948 Iron 4G Coil Ignition

One last item to check on the carb before you start on the ignition system. I had a long chat at the Annual Rally with Otto Mederle and Jens Buesse who have studied the Solex carbs in great detail. One point to check is that you have the small slot in the gasket which goes in the joint secured by th...
by paul.jameson
Mon Sep 02, 2019 8:11 pm
Forum: Main Chat Forum
Topic: petrol tank repairs
Replies: 3
Views: 435

Re: petrol tank repairs

Ray Pettit in Nottingham.
by paul.jameson
Thu Aug 29, 2019 8:51 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5009

Re: 1948 Iron 4G Coil Ignition

Many years ago, the Club produced a booklet called Square Forum which consisted essentially of a series of articles reprinted from Cheval. One of these described a conversion to coil ignition from magneto. I carried out this conversion on my 1948 4G but was surprised to find the misfires persisted w...
by paul.jameson
Wed Aug 28, 2019 9:15 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5009

Re: 1948 Iron 4G Coil Ignition

There has to be a condenser (or capacitor) somewhere. If you can't see one anywhere external, it is possible that the system is still using the one in the magneto which might well be life - expired by now. So I suggest a condenser search - it has to be connected to points / coil somewhere. If you ca...
by paul.jameson
Wed Aug 21, 2019 8:48 pm
Forum: Member's Bikes
Topic: '57 VH 500 - New Member
Replies: 9
Views: 754

Re: '57 VH 500 - New Member

That is one very nice, largely original machine.
by paul.jameson
Wed Aug 21, 2019 8:44 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5009

Re: 1948 Iron 4G Coil Ignition

We might now be into the ignition issues. So, remove the distributor cap, take hold of the rotor arm with one hand and try to kick the engine over. If you can do this without the rotor arm turning, the fibre drive gear to the distributor has stripped. If it turns ok, then I need a detailed descripti...
by paul.jameson
Thu Aug 15, 2019 8:38 pm
Forum: Four stroke
Topic: My 46 SQ4 is finished - or so I thought
Replies: 13
Views: 1214

Re: My 46 SQ4 is finished - or so I thought

Further to our chat earlier, your photo of the inside of your timing chest tells me that you are missing what C W Waller calls "the all-important flange" around the hole for the magneto shaft. Hopefully someone can provide a photo of this which should make all clear to you.
by paul.jameson
Thu Aug 15, 2019 8:14 pm
Forum: Ariel Talk
Topic: 1948 Iron 4G Coil Ignition
Replies: 64
Views: 5009

Re: 1948 Iron 4G Coil Ignition

This still sounds like a carb problem to me, although I did have some spectacular problems with the coil ignition on my own 1948 4G from time to time. As one last check on the Solex carb, have you undone the 4 screws which hold the float chamber section to the rest of the carb? This joint is vertica...

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