Gear change quadrant repair

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Mark Cook
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Gear change quadrant repair

Post by Mark Cook » Tue Dec 22, 2009 7:21 pm

You must have all seen or had a damaged shaft. I'm sure one or two of you have found a solution to get you out of trouble.

Here is the PES way.

First machine the quadrant so that you have a 9mm diameter stub 10mm long.
Repair shaft.jpg
The PES shaft is CNC machined from EN16 high tensile steel. So should give much better service than the original or cheap pattern ones you find kicking around. It is also precision bored to 9mm to aid fitting and to provide a reliable joint.
Repair shaft1.jpg
We prefer to tig weld the new shaft, although many other jointing techniques could be used. If you were to bronze weld it, we would recommend machining the stub to 8.75mm and fluxing the contact faces to ensure a strong joint.
Repair shaft2.jpg
And of course we are more than happy to do this repair for you if you don't have the equipment at hand.
CCM Britain motorcycles and spares manufactured exclusively by PES

+44 (0) 1709 894192
http://www.ccm-britain.co.uk (online shopping experiance)

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rhino
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Re: Gear change quadrant repair

Post by rhino » Tue Dec 22, 2009 11:58 pm

Brilliantly simple fix Mark :grin:

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Re: Gear change quadrant repair

Post by SteveS » Wed Dec 23, 2009 10:47 am

Hi

See also NSA Classic Motorcycles 01502 716115 / 07780 597102

http://cgi.ebay.co.uk/BSA-C15-C25-B25-B ... 3358216b1b

Regards Steve
Steve Sewell

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Mark Cook
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Re: Gear change quadrant repair

Post by Mark Cook » Wed Dec 23, 2009 10:55 am

Thanks for making my point Steve
CCM Britain motorcycles and spares manufactured exclusively by PES

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Re: Gear change quadrant repair

Post by SteveS » Wed Dec 23, 2009 11:12 am

:laugh :thumb

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Steve Sewell

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Re: Gear change quadrant repair

Post by gauloises » Wed Dec 23, 2009 5:31 pm

To avoid the need to weld the shaft with the possibility of distortion, I bored the quadrant to give a press fit to the shaft and fitted a roll pin. Using a torque wrench I found that you needed to put 180lb on the pedal before the pin sheared. If you need that sort of pressure to change gear a worn spline is the least of your problems.

Happy Christmas to everyone and thanks for the hours of amusement and interesting reading you've all given me.

Gauloises

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