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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 03-21-2010, 02:05 AM   #1 (permalink)
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Magneto Sprocket/Gear Removal

What tool is required to remove the magneto sprocket from a K2F?
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Old 03-21-2010, 08:53 PM   #2 (permalink)
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Please rephrase your question - be careful you can cause a lot of expensive damage.

14mm - 9/16"
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Old 03-21-2010, 08:56 PM   #3 (permalink)
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You will need a puller and some bolts that screw into the gear. Be careful with the puller on the shaft of the magneto as you can damage it. It is a taper fit.
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Old 03-21-2010, 10:40 PM   #4 (permalink)
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I was not specific. I am moving a few magnetos around, and the one I was asking the question about is actually a K2FC.

The gear appears to be fiber with a metal center. The metal center does not have any threaded holes, but rather what may be something like rivets. The center hole in the gear appears to be threaded.

So one of my questions is whether the gear is pressed on or threaded. And the second part is whether a specific tool exists that treads into the center hole for removing the gear, or if some othe method is used.

Thank you.
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Old 03-21-2010, 11:59 PM   #5 (permalink)
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Quote:
Originally Posted by blue-triumph View Post
What tool is required to remove the magneto sprocket from a K2F?
Magneto wheel. Unscrew the securing nut and screw into the gear centre the withdrawal tool DA50/f which is supplied with the toolkit.. When the tool is in position, tighten the centre bolt and the gear will be withdrawn from the shaft. The automatic timing device is released by unscrewing the central bolt which has a self-extracting thread.
From manual no.17 engine 0945 and D101 onwards Sept 1956
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Old 03-22-2010, 12:34 AM   #6 (permalink)
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OK. That is what I understood from reading the manual, but I have had difficulty finding the tool, so I thought perhaps I misunderstood. I will see if I can track down the tool.
Thanks.
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Old 03-22-2010, 02:32 AM   #7 (permalink)
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There are two type of mags - auto advance and manual. Which one do you have?

They are both different but the same if that makes sense. Once the bolt or nut is removed, you need to remove the fiber gear which is tapered so you need a puller to remove it off the shaft. there are other ways to remove it but for now see if you can find a puller. Under no circumstances hit the nut or bolt with a hammer to release it you may damage your magneto and the thread etc.
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Old 03-22-2010, 11:14 AM   #8 (permalink)
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I have one of those "cast butter" fibre gears with several broken teeth sitting on the shelf - a testimony to rookie stupidity. I replaced it with an aluminum one.

The tapered fit setup is the same as with the ignition rotor; side-force tapping should free it off.
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Old 03-22-2010, 01:26 PM   #9 (permalink)
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I have both magneto types. I was able to remove the auto advance without any problem. The mag I am presently working on is the non auto advance. I will check with Rabers in San Jose, they may have the tool. If anyone knows of a U.S tool source that has this puller, I would appreciate the name. Thanks all of your responses.
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Old 03-22-2010, 09:12 PM   #10 (permalink)
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Why two types? Which one is correct for your bike? (The method of timing varies for both theses gears) Is the magneto fitted in place? This may seem stupid. Remove the nut, loosen the magneto on the back of the casing just a little about 3-4mm. replace the nut just until the thread is just about to come out past the nut.

Remember if you hit the nut with a mallet you are moving the armature backwards in its casing and can cause damage to the internals of the slip ring etc. That is why you will need to loosen the magneto off the back of the casing; you can now pack a wide flat wedge to either side of the gear between the timing case and the gear. With this in place you can now give the centre nut a sharp tap with a mallet and this should loosen the tapered end off the shaft. The gear will now slid off.

What bike do you have?
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