Author Topic: Factory ignition timing  (Read 206 times)

Offline a101960

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Factory ignition timing
« on: 21.09. 2020 16:24 »
Given that it can sometimes be difficult to tighten the magneto drive up with out it slipping and loosing the timing, would anyone like to speculate on how accurate the factory timing was? Would it have be done absolutely dead on, or do think that near enough was good enough? I wondered about that because of production line constraints. It was common practice in the Midlands for workers to be employed on piece work rates so obviously numbers produced would be the dominating factor. Not a system conducive to absolute accuracy I would have thought.

Online Triton Thrasher

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Re: Factory ignition timing
« Reply #1 on: 21.09. 2020 20:11 »
The parts were new.

Offline muskrat

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Re: Factory ignition timing
« Reply #2 on: 21.09. 2020 20:22 »
G'day John.
TT hit the nail on the head. Probably lessens the "fudge factor".
Back in the day with the fuel that was available, close was close enough and I would imagine that they would have had methods of stopping the creep.
Been a long while since I had a magie on the BSA's but remember setting it up a bit the other way to get it right when done up. May take a few go's.
Orabanda slots the mounting holes to fine tune.
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Online berger

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Re: Factory ignition timing
« Reply #3 on: 21.09. 2020 20:36 »
if the tapers are a good fit a single central tap with a nice fitting brass or whatever drift will hold it, changed my maggy a couple of weeks ago and got it timed up first go  --- thank ****

Online RDfella

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Re: Factory ignition timing
« Reply #4 on: 21.09. 2020 20:59 »
Heating the gear before dropping it on the taper should eliminate creep. Now why haven't I tried that?
'49 B31, '49 M21, '53 DOT, '58 Flash, '00 Firestorm, Weslake sprint bike.