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The BSA A7-A10 Forum
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Lucas, Ignition, Charging, Electrical
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dynamo belt tension
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Topic: dynamo belt tension (Read 1028 times)
Spitfiremk9
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dynamo belt tension
«
on:
24.03. 2013 16:49 »
Anyone help me remember how much play there should be in my dynamo belt ,i've just looked at it and there was way too much and so have adjusted to approx 1/4" up and down in the middle top run, is this enough or to tight, Regards BobH.
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chaterlea25
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Re: dynamo belt tension
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Reply #1 on:
24.03. 2013 17:00 »
Hi Bob
What kind of belt drive is fitted?? vee or toothed?
John
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1961 Super Rocket
1963 RGS (ongoing)
warmshed
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Re: dynamo belt tension
«
Reply #2 on:
24.03. 2013 18:49 »
Depends on what one you have fitted. The one made by Dynamo regulators .com (who make the DVR") say "Correct tension is such that it is easy
to turn the belt at the middle of the lower run by about 45 degrees each way."
Their full instructions are here
http://www.dynamoregulators.com/documents/belt_drive_data.pdf
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Spitfiremk9
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Re: dynamo belt tension
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Reply #3 on:
24.03. 2013 19:23 »
Hi John, vee , from sean miller , advertises in the BSA "star " but for life of me can't find paperwork Thanks everyone BobH
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chaterlea25
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Re: dynamo belt tension
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Reply #4 on:
24.03. 2013 23:53 »
Hi Bob
Rekon a 1/4 in or so would do ???
John
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1961 Super Rocket
1963 RGS (ongoing)
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bob hebdon
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Re: dynamo belt tension
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Reply #5 on:
25.03. 2013 11:16 »
Thanks John, it actually from Hawker electricals ,Regards BobH.
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" rules are made for the guidance of wise men and the blind obediance of fools"
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mayes
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Re: dynamo belt tension
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Reply #6 on:
25.03. 2013 18:53 »
John no more than 1/4 play
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bike running in rider running out
Tri 500 5Ta
B.S.A A10 1955 Under restoration
Smithgd
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Patrol in New Orleans
Re: dynamo belt tension
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Reply #7 on:
01.04. 2013 15:32 »
If I am reading this correct - The toothed belt is going to be set to run pretty tight. I think mine might have been too loose and the belt failed rather soon.
Any on had any experience with the stardard chain driving an Alton alternator??
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The BSA A7-A10 Forum
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Technical (Descriptive Topic Titles - Stay on Topic)
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dynamo belt tension