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Old 11-15-2014, 10:55 PM   #1
boxerboy81 OP
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Handlebar switch, lost bits.

The bike: 1978 R100RS.

The right handlebar switch was opened and the spring and ball bearing escaped to the nether regions of the shed.

Other than buying another assembly, is there an alternative ball bearing and easily available spring that might do the job?

If anyone had the dimensions, that'd be great!
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Old 11-16-2014, 04:30 AM   #2
rambozo
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Can't help with a source



The spring is about 9.7mm long
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Old 11-16-2014, 04:41 AM   #3
disston
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3.16mm is 0.1244094 inches.

1/8 of an inch is 0.125 inches.

A 1/8 inch ball bearing works.
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Old 11-16-2014, 09:13 AM   #4
Kai Ju
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So now you know the ball size. For the spring, measure the depth and diameter of the hole and see what you can find that matches the diameter.
If you can't find anything you can make your own spring out of a ball point pen spring. Measure the wire diameter, times two and subtract from the hole ID. Now find a piece if rod of that diameter, or less, and wrap the ball point pen spring around that.

Instructions on making springs can be found on the internet.
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Old 11-16-2014, 09:47 AM   #5
spo123
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Any BICYCLE shop should have a ton of loose, second hand ball bearings laying around.....free.
Just a thought.
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Old 11-16-2014, 10:30 AM   #6
Darryl's bmw
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That ball is the same size as the ball in a Krauser lock mechanism.

I got mine in a bicycle shop for $0.10 each
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Old 11-16-2014, 11:56 AM   #7
garyinalt
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I went to one of those party shops and bought a few of those little games that you have to move it around to get the little balls into the holes. They were the right size. I saved my spring though so I didn't need to find one of them.

Anybody else taking one of those switches apart should do it on a bed sheet.
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Old 11-16-2014, 12:05 PM   #8
Zoef zoef
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Quote:
Originally Posted by garyinalt View Post
Anybody else taking one of those switches apart should do it on a bed sheet.
Or inside a large, clear, plastic bag
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Old 11-16-2014, 12:34 PM   #9
grumpyoldbstrd
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A good locksmith may have padlock pin springs - they work a treat. Try Knights in Hardware Lane in the city. The spring from a BIC lighter can also be made to work.
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Old 11-16-2014, 01:18 PM   #10
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Thanks gents! We should be able to sort something with that info. Cheers.

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