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auto advance unit

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if I remove the advance unit to replace the springs, do I need to re-time the ignition?

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Yes you do Ernie , sadly. The unit fits to the magneto on a tapered shaft so there is no way to reposition it without re-timing. The slack in the pinions and chain are the problem even if you have a reference point and don't move anything else. Good luck , Howard

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You don't actually need to remove the auto advance unit to change the bob weight springs. The job is a bit fiddley but do-able with it in-situ, all you need is a steady hand and some thin long nosed pliers.

Jon S

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Previously howard_robinson wrote:

Yes you do Ernie , sadly. The unit fits to the magneto on a tapered shaft so there is no way to reposition it without re-timing. The slack in the pinions and chain are the problem even if you have a reference point and don't move anything else. Good luck , Howard

Thank you, Howard. That makes good sense.

e

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Previously paul_standeven wrote:

Where do you get the correct atd springs from? I want a set myself

Paul

Hi Paul,

i ordered mine from Walridge Motors here in Canada. Owner Mike Partridge is an ex-pat Brit, and is one of the major suppliers for Brit bikes over here.

cheers

e

 



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