camshaft end float 1955 g3lcs

Information relating to the Matchless G3 or AJS Model 16 350cc Heavyweight
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jimh
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Posts: 55
Joined: Sun Aug 30, 2020 10:50 am
Location: Merseyside UK

camshaft end float 1955 g3lcs

Post by jimh »

On checking the Magneto chain tension I noticed that there is play/end float on the Magneto drive sprocket (000727), am I right in assuming there should be none or minimal play here and it's the Camshaft needs shimming to correct this.
Thanks Jim
Andy51
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Location: BERKS UK

Re: camshaft end float 1955 g3lcs

Post by Andy51 »

Jampot Spares sells 3 thou shims; I seem to remember AMC Classic Spares sells other thicknesses. They are easy to fit; take off the outer cover and fit them, it's trial and error to get minimum play with no binding. They are cheap enough so get a number in different thicknesses. When you have established required thickness, they should go between main crankcase and cam. Use as few as possible to make up required thickness, eg better 1 x 5 thou than a 2 and a 3. Took me about 15 mins on my 18S. Andy
jimh
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Posts: 55
Joined: Sun Aug 30, 2020 10:50 am
Location: Merseyside UK

Re: camshaft end float 1955 g3lcs

Post by jimh »

Thanks Andy, just checked the end float before taking the Timing gear cover off, seems to be 15 to 18 thou. play.
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