Lucas mag cam ring

[chris wastell]

The cam ring of my Scott has a worn slot where the advance/retard fits, so it becomes disconnected randomly. Is it possible to turn the ring through 180 degrees, cut a new slot and location cut-out and carry on? If so, can anyone recommend a reliable and skilled enough engineer to do the machining please?

[chris wastell]

Alternatively can anyone recommend a good supplier of suitable cam ring please?
Chris

[Roadster]

Tony Cooper should be able to help. He is in the Black country. I have PM’d you his contact details.
Rod

[chris wastell]

Many thanks Rod. I’ll give him a try tomorrow. Much apreciated.
Chris

[Stan Thomas]

Tony Cooper is probably the best there is – having acquired all the stock and specialist test equipment when Joe Lucas ran out of sparks – and he does a lot of work for the “middle-men” who advertise and ply their trade at Stafford and the like ……………..

[Oldguy]

Does good work too.

Mike.

[chris wastell]

Good to know he comes recommended by so many. Thanks chaps. No answer on the phone today, will try him on Monday 🙂

[chris wastell]

Sadly, To y is no longer supplying parts so the search continues 🙁

[Stan Thomas]

Hi Chris,

You should be able to pick up a cam ring easily enough – are you going to Stafford this week-end, or do you know someone who could look out for you??? Give me a shout as I’ll be going if I can help.

“Re-positioning” your old ring is really a non-starter (as your bike would be afterwards!) as the internal timing of the magneto is most crucial (i.e. the exact position of the armature relative to the magnetic flux as the points open).

Whilst on about magnetos – is is worth setting a mag up with a degree plate before fitting to measure the exact moment when the points open to check they are 180 degrees apart – and if necessary, stone one of the ramps to equalise. I did a mate’s Dominator mag a while back and there was a four degree difference.

Meks ya wonner goo an buy an Onder, as we say in Birmingham.

[chris wastell]

Thanks for the tip, Stan. I didnt know it was on this week. I do indeed have a mate who is sure to go, I’ll get him on the case. Very kind of you to offer to help.

[Tman]

Rather than be immobile for the want of a cam ring, why don’t you put a spot of weld on the slot and file it down to suit? It may not last another 70 odd years but it would do a turn.
Buyer nonda?
It would take more than a worn mag cam to make me do that…..I rode them for close on forty years for commuting but I don’t miss the general blandness one bit..! 🙂

[SwedScott]

Hi

Have you tried Dave Lindsey? Excellent service and very knowledgeable. Easy to find on the “net” also: https://davelindsley.co.uk

Best regards

Leif

[chris wastell]

Tman, I thought about weld but worried that the ring may distort. Do you think that is a feasible idea? Swedscott, I had a mag done by Dave Lindsey in the ’90s and would never use him again. This cam ring is 20 years old and has probably done about 10 thousand miles max. It does seem a shame to junk it…or do I need to get with the times? appreciate your comments. Don’t think I’m desperate enough to buy a Nonda 😳

[Barrie]

If you put a tac on with mig, you should not get a problem

[Stan Thomas]

Barrie is right – but attack with a mig – where can you get a Russian fighter plane …………………..

[Author]

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