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Should chain tension change hot vs. cold?

Started by WhiteStripe, April 20, 2010, 09:14:47 AM

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WhiteStripe

April 20, 2010, 09:14:47 AM
I have noticed that my chain play measures about 1" (24mm) hot and closer to 1.5" (cold).

Is this normal or am i crazy?

Also, noticed that the spec on my swing arm is 30 - 32mm, but in the manual it is 25 to 27mm.  Comments?  Am i thinking too hard about this?
2006 S2R 1000, Arrow CF exhaust, FatDuc 02, CF open cc with stock pp

ducpainter

#1
April 20, 2010, 09:39:50 AM
Quote from: WhiteStripe on April 20, 2010, 09:14:47 AM
I have noticed that my chain play measures about 1" (24mm) hot and closer to 1.5" (cold).

Is this normal or am i crazy?

Also, noticed that the spec on my swing arm is 30 - 32mm, but in the manual it is 25 to 27mm.  Comments?  Am i thinking too hard about this?
The difference in hot to cold is why they say lube a warm chain and adjust a cold chain, so no you're not crazy.

Unless you've raised the ride height in the rear...either of those numbers would work.

Maybe just a little. ;D
"Once you accept that a child on the autistic spectrum experiences the world in
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    is even more amazing than yours."
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    Ask a mother who gave birth to a stillborn.
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IdZer0

#2
April 20, 2010, 10:20:05 AM
 ??? Why is a chain longer when it's cold than when it's warm? I mean the metal expands with increased temp.
2007 Monster 695, DP ECU, Low mount Alu Termignonis
replaced by 2011 848 EVO

mitt

#3
April 20, 2010, 11:58:13 AM
Are you sure you are measuring it the same way?  I can get several different measurements depending where the revolution the rear wheel is.  I think there is a slight variation in the concentricity of sprocket to the wheel axle.


mitt

WhiteStripe

#4
April 20, 2010, 12:17:56 PM
Thanks - falls into the category of ride more think less.

Quote from: mitt on April 20, 2010, 11:58:13 AM
Are you sure you are measuring it the same way?  I can get several different measurements depending where the revolution the rear wheel is.  I think there is a slight variation in the concentricity of sprocket to the wheel axle.

Yeah, measured it on side stand several times rolling forward a couple feet each time.  No real tight spots on chain. 

2006 S2R 1000, Arrow CF exhaust, FatDuc 02, CF open cc with stock pp

ducpainter

#5
April 20, 2010, 12:30:16 PM
Quote from: IdZer0 on April 20, 2010, 10:20:05 AM
??? Why is a chain longer when it's cold than when it's warm? I mean the metal expands with increased temp.
As the metal expands the clearance between the pins and rollers decreases as does the clearance between the rollers and the sprockets.

The chain doesn't actually change length.
"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


MAXdB

#6
April 21, 2010, 07:01:52 AM
I personally never noticed much of a difference between a cold and a hot chain but I do know that the chain's tightness will differ when the rear axle bolt is loose as opposed to properly tightened.

WhiteStripe

#7
April 22, 2010, 08:58:06 AM
Quote from: MAXdB on April 21, 2010, 07:01:52 AM
I personally never noticed much of a difference between a cold and a hot chain but I do know that the chain's tightness will differ when the rear axle bolt is loose as opposed to properly tightened.

Should have mentioned i am SSS
2006 S2R 1000, Arrow CF exhaust, FatDuc 02, CF open cc with stock pp
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