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25mm rear axle torque value?

Started by Teutonics, September 17, 2008, 07:19:28 PM

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Teutonics

September 17, 2008, 07:19:28 PM
I searched, and couldn't find it...

I have the factory s/m for my bike, but the manual is an '00 and my bike is an '02.  The torque value in the manual is for a 17mm rear axle, and mine is a 25mm axle.  The torque spec stated for the 17mm is 72 Nm, but is it different for the 25mm?

TIA!!!
Atlanta, GA - 2002 M900ie

ducpainter

#1
September 17, 2008, 07:25:11 PM
Quote from: Teutonics on September 17, 2008, 07:19:28 PM
I searched, and couldn't find it...

I have the factory s/m for my bike, but the manual is an '00 and my bike is an '02.  The torque value in the manual is for a 17mm rear axle, and mine is a 25mm axle.  The torque spec stated for the 17mm is 72 Nm, but is it different for the 25mm?

TIA!!!
I don't know the answer, but if the rear is hollow like the front...

I'd use the same value...

which is 63 Nm with greased threads
"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."
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Howie

#2
September 17, 2008, 07:29:26 PM
83 Nm, same as the ST.

ducpainter

#3
September 17, 2008, 07:36:18 PM
Quote from: howie on September 17, 2008, 07:29:26 PM
83 Nm, same as the ST.
Is it solid Howie?
"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.”


Speeddog

#4
September 17, 2008, 07:40:58 PM
<howie voice>

No, it's hollow.

</howie voice>
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

ducpainter

#5
September 17, 2008, 08:00:08 PM
Quote from: Speeddog on September 17, 2008, 07:40:58 PM
<howie voice>

No, it's hollow.

</howie voice>
<dp voice>

Weird that the same fastener on a similar shaft size takes a different torque.

</dp voice>   ;D
"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.”


Teutonics

#6
September 17, 2008, 08:11:32 PM
Awesome, thanks for the quick response!!!
Atlanta, GA - 2002 M900ie

Howie

#7
September 18, 2008, 08:17:20 PM
Quote from: ducpainter on September 17, 2008, 08:00:08 PM
<dp voice>

Weird that the same fastener on a similar shaft size takes a different torque.

</dp voice>   ;D
From the factory manual:
Front wheel nut M 25x1.25 63 * GREASE B
Rear wheel shaft nut M 25x1.25 83 * GREASE B
No idea why.

Speeddog

#8
September 19, 2008, 10:38:29 AM
I haven't done a calculation recently, but IIRC, chain tension plus forward thrust at the rear axle can be ~1500 lbs at WOT in 1st gear, so that makes sense to me to have more pinch.
- - - - - Valley Desmo Service - - - - -
Reseda, CA
(951) 640-8908

~~~ "We've rearranged the deck chairs, refilled the champagne glasses, and the band sounds great. This is fine." - Alberto Puig ~~~

Howie

#9
September 19, 2008, 08:19:44 PM
Quote from: Speeddog on September 19, 2008, 10:38:29 AM
I haven't done a calculation recently, but IIRC, chain tension plus forward thrust at the rear axle can be ~1500 lbs at WOT in 1st gear, so that makes sense to me to have more pinch.

Definitely makes sense.
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