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Electric starter on a comet ?


phil_h

Well Known and Active Website User
VOC Member
I would like my wife to have more choice in the bikes she can ride without me being there to start them - last year I adapted a Velo Venom electric starter to fit her rigid Velo MSS, and that has now become her favourite bike :)
So I would really like to know if anyone thinks an electric starter could be adapted to fit a Comet.
 

b'knighted

Well Known and Active Website User
VOC Member
There was an electric start Comet at the Riders Rally.

Can the Phil Pearson Engineering starter sold for BSAs can be adapted to suit a Comet. I expect that you'd need to adapt the Vin ESA to accept BSA parts.
 

timetraveller

Well Known and Active Website User
VOC Member
There is also a German Comet which comes to Dick Sherwin's barbecues which has a combined starter/generator where the magneto normally fits. It has been around for at least two years and seems reliable. My understanding is that it is a prototype which might be marketed if there is enough interest.
 

A_HRD

Well Known and Active Website User
VOC Member
And then there's the Bob Dunn pig-ugly electric starter which looks a bit like this one… work in progress…. (not mine).

Peter B
Bristol, UK.
P1030478.JPGP1030482.JPG
 

vibrac

Well Known and Active Website User
VOC Member
Bananaman may give us the latest but I believe Grossett or another "french connection" is testing one at the moment but thats been the case for at least 3 years to my knowledge.
Till then may I suggest a good mag , lowish compression a dual plug head and a HD pop out decompressor
 

ClassicBiker

Well Known and Active Website User
VOC Member
I've posted these before when the subject of e/starts for Comets has come up. I haven't contacted the gent mentioned in the videos but have wondered if he might be able to come up with something. My thought being that a Matchless uses an AMC gearbox which is similar to the Norton box used by some Comet owners. I'm thinking that might be part of the answer.
Just a thought or two.
Steven

 

davidd

Well Known and Active Website User
VOC Member
I think I posted this along with Steven's post earlier when this subject arose, but I could not find it with a search.
This is an electric start much like the one above. Norton box and an a small tractor starter. It has worked perfectly for years on Bill Norton's Cooper. When you look at the photos you will notice that there are quite a few missing parts because it is a Cooper, but after studying it, most of what should be added back would be a great help.

Norton Car_PB_2.jpg
The G50 plate is missing, but a new plate could be cut out to go around the starter and the gear box. The F106 is missing, but the G50 would include some holes at the top to bolt a truncated F106, which could be fabricated from plate.

Norton Car_PB_3.jpg
There is no inner and outer primary cover, but the inner can be a flat plate as I have done on several racers and the outer primary can then be the stock item. The inner primary plate would go around the starter, supporting it and providing the holes for the short F106. It would be a privilege to be forced to use the Newby dry clutch. This clutch will work with the stock outer primary with some very minor modifications to the inside of the outer primary to clear the belt.

It is still a lot of work, but nowhere near the work of the other systems. The fabricating is fairly straight forward and you can keep your generating system.

David
 

clevtrev

Well Known and Active Website User
VOC Member
Bananaman may give us the latest but I believe Grossett or another "french connection" is testing one at the moment but thats been the case for at least 3 years to my knowledge.
Till then may I suggest a good mag , lowish compression a dual plug head and a HD pop out decompressor
That would be Hervé Hamon, not François Grossset.
 

b'knighted

Well Known and Active Website User
VOC Member
And then there's the Bob Dunn pig-ugly electric starter which looks a bit like this one… work in progress…. (not mine).

Peter B
Bristol, UK.
View attachment 13257View attachment 13258
Comet  Electric start.jpg
Pig Ugly! - How dare you. Oh, I just looked at the pictures again and you're right.
This one has now been modified with a longer four brush motor, probably Yamaha FZX750 and a modified Suzuki SV650 sprag. The longer starter motor entailed screwing the filter cover down the filter bore and the fitting of a remote filter on the battery carrier bolts.
My chain tensioner is different from the one in the above pictures, having a small duplex sprocket pressed under the chain. Can you tell me what material it is made from please Peter?
 

b'knighted

Well Known and Active Website User
VOC Member
Hello b' knighted, your starter originally had a plastic block just like that one. The duplex sprocket was an upgrade. John.
Thanks John,
It all adds to the learning circle. I had visions of further modifying to allow an external adjustment of the tensioner and thought that modifying the plastic block may be easier. Did you make the sprocket from scratch?
 

john998

Well Known and Active Website User
VOC Member
Hello Ian, no it was all Bob Dunn's handy work. It occurred to me that if the tensioning sprocket was spring loaded it would have worked better, but it would have been harder to arrange. Regards John .
 

b'knighted

Well Known and Active Website User
VOC Member
Hello Ian, no it was all Bob Dunn's handy work. It occurred to me that if the tensioning sprocket was spring loaded it would have worked better, but it would have been harder to arrange. Regards John .
Thank you. I found I had to adjust it before assembly. There doesn't appear to be space for a coil spring but either a curved leaf spring or a tensioning bolt from underneath may work. As the chain is static when the engine is running it only needs to take the slack out of the bottom of the chain to hold the chain in deep contact with the sprockets while the top is pulled tight during starting. This would suggest that a screw adjuster in compression may be better than a spring.
 

vibrac

Well Known and Active Website User
VOC Member
I have admired that newby and tractor stater before both my race comets have his belt drive magic! Did the gear at the back come with the tractor starter? I bet it was some californion special tractor we can't get bits for in UK sorry about any spelling etc slumming with iPad where is me key board?
 

davidd

Well Known and Active Website User
VOC Member
I have admired that newby and tractor stater before both my race comets have his belt drive magic! Did the gear at the back come with the tractor starter? I bet it was some californion special tractor we can't get bits for in UK sorry about any spelling etc slumming with iPad where is me key board?
Tim,

You are close! Bill Norton lives in Pennsylvania, which is Amish country. There are many agricultural shops with a wide variety of parts. He wanders into one of them and walks out with the parts. He is headed to the International, but I will see if he knows what he got. Often he does not because they are so helpful!

David
 

David Townsend

Website User
VOC Member
Bananaman may give us the latest but I believe Grossett or another "french connection" is testing one at the moment but thats been the case for at least 3 years to my knowledge.
Till then may I suggest a good mag , lowish compression a dual plug head and a HD pop out decompressor
Thanks for that, I'll look in to that further.
Regards,
Dave
 

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