I've had an Alton electric start on my MkIIA for ten years. Recently I've come across a few references to the sprag clutch woodruff key breaking under the strain of starting, and mentions of modifications than can be made to prevent this.
Is this worthwhile? Have I just been lucky so far?
I met a Commando owner recently (at Hale bike night near Milnthorpe in case he reads this) who said he'd had this key break and had engineered a way of preventing it, so the knowledge is out there, if only I can get the details.
Alton electric start mods
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Triplex sprocket
Hi James,
I'd ask you for details but my bike has a belt drive. But the pulley still has two threaded holes (for an extractor), so not so different from a sprocket? Can't the same principle you used be adapted?
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Alton starter
Sorry but the belt drive doesn't leave enough space for the mod I make to fit.
Jim
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Alton starter
I have tried to upload some pictures but it keeps saying error.
I will be at the National rally with some samples.
hope to see you there. Or give me a call if you're in Dorset.
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Hi Rob,
I have made a modification that works. It relies on the bike having a triplex sprocket however.
there is some machining to do on the Alton sprang but nothing major.
Mine has been working since the middle of lockdown. Up until now I have had no complaints from those who have had it done.