Belt tension

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white1j0
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Belt tension

#1

Post by white1j0 » Mon Nov 04, 2013 4:14 pm

Anyone know how much tension should be on an inner primary belt drive belt, it's a 1 1/2" enclosed belt drive, running on a '52 Pan, It will only kick over without slipping when it is very tight, all parts are new,



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Re: Belt tension

#2

Post by Huck » Mon Nov 04, 2013 4:28 pm

It needs to have some play to it. It'll get tighter when warm. Are you sure its not the clutch slipping?

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Re: Belt tension

#3

Post by white1j0 » Mon Nov 04, 2013 4:40 pm

Huck wrote:It needs to have some play to it. It'll get tighter when warm. Are you sure its not the clutch slipping?
No, the outer primary cover is off, and the clutch hub is skipping over the teeth

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Re: Belt tension

#4

Post by TimmyV » Mon Nov 04, 2013 4:56 pm

BDL recommends 1/2" total up and down play for their 8mm & 11mm 1 1/2 " belt drive primaries.

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Re: Belt tension

#5

Post by white1j0 » Mon Nov 04, 2013 6:14 pm

Huck wrote:It needs to have some play to it. It'll get tighter when warm. Are you sure its not the clutch slipping?
You were right, the clutch was slipping, my eyes are getting old, Thanks

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Re: Belt tension

#6

Post by Bigincher » Mon Nov 04, 2013 7:07 pm

I was taught that the tension is correct if you can twist the belt 90 degrees at the midpoint between sprockets.

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Re: Belt tension

#7

Post by Huck » Tue Nov 05, 2013 3:01 am

white1j0 wrote:
Huck wrote:It needs to have some play to it. It'll get tighter when warm. Are you sure its not the clutch slipping?
You were right, the clutch was slipping, my eyes are getting old, Thanks
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Re: Belt tension

#8

Post by panfreak » Fri Nov 08, 2013 8:31 pm

When you think you have it right, go for a good ride then check again. I was really amazed at how much tighter it got. Subsequently I run my looser than I normally would have thought it should be when adjusting cold. But that's just me.

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