Author Topic: A10 RGS Replica  (Read 607 times)

Online JulianS

  • 1962 A10
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Re: A10 RGS Replica
« Reply #30 on: 17.09. 2020 12:28 »
It can be a real struggle to get the lower pickup out of the K2FC type mag shown in the photo, you need a 4 ba socket for the hex headed screws. Easiest if the ski slope is removed. Space a little tighter if you have a reverse camplate fitted to the gearbox. Also fun to get this one back in.

The top pickup should not be too much of a problem.

Photo shows the orientation of points and cam as fitted to my A10 (also shows an EasyCap fitted)

Online RichardL

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Re: A10 RGS Replica
« Reply #31 on: 17.09. 2020 12:39 »
I'm not going to try to rationalize this against visible sparks, long-jumping sparks, sparks that die under compression, sparks that leak through slipping or pickup cracks, correct or incorrect resistances, etc., but, with all this trouble, if the mag is apart for inspection/repair, you should throw in a test for magnetization strength. There are instructions for that test either here on the forum or in Lucas service sheets. Can't point to it right now.

Another thing to do while it's apart is to change from the stock capacitor to a Brightspark EasyCap. Why wonder if your cap is a problem now or in the future?

Richard L.

Ha! Julian posted the photo of the EasyCap almost exactly when I was writing that you should add one.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Offline r3sc

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Re: A10 RGS Replica
« Reply #32 on: 17.09. 2020 13:18 »
Hi All,

I can’t thank you all enough for the input, it’s fantastic and I can’t wait until I can get back to the bike and implement the suggestions that you’ve all made.

I’m going to take off the magneto firstly and strip it to find out exactly what I have and then move on from there.

Where is the stock capacitor usually located as I don’t remember seeing one when I stripped and rebuilt the mag?!

Where is the best place to buy an Easycap? I’ve never heard of or seen one before.

The other consideration would be to send the entire unit off to have it reconditioned and tested which would eliminate it for sure.

I’ll keep you posted but I can’t get to the bike until W/C 28-9-20.

Once again, many thanks.

Online RichardL

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Re: A10 RGS Replica
« Reply #33 on: 17.09. 2020 13:57 »
A few links to Brightspark Magnetos' pages:

This one will show you where to locate the condenser (condenser, capacitor, tomato, tomAHto) while showing how to completely remove it: http://brightsparkmagnetos.com/condensectomy/complete_works.htm

This one shows what most of us have done, that is, the easy way: http://brightsparkmagnetos.com/condensectomy/quick_snip.htm

Here is the EasyCap replacement: http://brightsparkmagnetos.com/easycap/index.htm

Richard L.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Offline Steveba10

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Re: A10 RGS Replica
« Reply #34 on: 23.09. 2020 19:57 »
Interesting thread.
You would think with fuel, compression and a spark something should happen.
I think perhaps the dry spark plug might be the best clue you have.

A couple of quick practical tests I use to start recalcitrant engines follow.

Usually if you place your hand over any carb intake and turn the motor over the strong suction will pull plenty of fuel out of both jet circuits and the return pressure pulse due to the inlet valve closing will give a palm wet with petrol. Not very scientific but a quick and dirty way to draw fuel through and see its presence.
Both my Jags run Webbers and this trick gets them to fire after long periods of inactivity.

Another useful test.
I keep a couple of neon spark plug indicators in tool boxes, if you’ve not seen them they look like extensions to a spark plug fitting between the plug and it’s cap. The body is transparent coloured plastic and within is a neon bulb that will flash bright every time the plug is fired.  This will show whether your plug is sparking under compression or not. A weak flash shows a poor or non-existent spark. If the engine starts it will run happily with the tester in place. Very useful for lawn mowers where the coils seem to die over winter.

Performing both those test usually quickly pinpoint the trouble being either fuel or spark. If both are good then look for something deeper.
Good luck,
Steve.
mod edit: found neon spark indicator on fleebay https://tinyurl.com/y66gghud