Rear axle torque

[Leo167]

Adjusted the "low maintenance" chain on my Gen 2, looked in the book for torque values
Book states 100 Nm but I noticed the axle blocks stamped 125, I'm kind of associating this 125 stamp
a torque value since my 2022 S1000R calls for 125 Nm..... So do I go book or writing on the wall?
BTW- the tic marks on these swingarms don't seem to be 100% accurate (better than the japs)
but thought the Germans were do or die with accuracy ??

[smithy]

Originally Posted by Leo167

Adjusted the "low maintenance" chain on my Gen 2, looked in the book for torque values
Book states 100 Nm but I noticed the axle blocks stamped 125, I'm kind of associating this 125 stamp
a torque value since my 2022 S1000R calls for 125 Nm..... So do I go book or writing on the wall?
BTW- the tic marks on these swingarms don't seem to be 100% accurate (better than the japs)
but thought the Germans were do or die with accuracy ??

125nm is the correct torque for the Gen-2. Gen-1 is 100nm.

The pic below is straight out of the Gen-2 owners manual.

Smithy.

[af1-windy]

Originally Posted by Leo167

Adjusted the "low maintenance" chain on my Gen 2, looked in the book for torque values
Book states 100 Nm but I noticed the axle blocks stamped 125, I'm kind of associating this 125 stamp
a torque value since my 2022 S1000R calls for 125 Nm..... So do I go book or writing on the wall?
BTW- the tic marks on these swingarms don't seem to be 100% accurate (better than the japs)
but thought the Germans were do or die with accuracy ??

Mine's a Gen1, this is the chain alignment with the marks on the swingarm..



This is the chain aligned with the tool, marks were abiout a quarter out.



  windy

[esso_sa]

Originally Posted by Leo167

Adjusted the "low maintenance" chain on my Gen 2, looked in the book for torque values
Book states 100 Nm but I noticed the axle blocks stamped 125, I'm kind of associating this 125 stamp
a torque value since my 2022 S1000R calls for 125 Nm..... So do I go book or writing on the wall?
BTW- the tic marks on these swingarms don't seem to be 100% accurate (better than the japs)
but thought the Germans were do or die with accuracy ??

For some reason there are 2 rear axle torque specs for Gen 2.
2020 production year (like mine) are 100 Nm in the user manual.
2021+ models are 125 Nm
I dont’t know if there are any axle differences between 2020 and 2020+ models, but for some reason BMW changed the rear axle torque values.
I do mine at 100 Nm. There aren’t any numbers stamped on my axle bolts

Re the wheel/chain alignment, I don’t use the axle marks as a reference. I use the vernier caliper and measure how much the adjusting bolts are unscrewed from the axle and then make sure both sides are exactly the same

[Leo167]

Originally Posted by smithy

125nm is the correct torque for the Gen-2. Gen-1 is 100nm.

The pic below is straight out of the Gen-2 owners manual.

Smithy.

Hmm? Swear my E version of the manual stated 100 going to check the physical book when I get home…. Went with 125 anyway

[Leo167]

Originally Posted by af1-windy

Mine's a Gen1, this is the chain alignment with the marks on the swingarm..



This is the chain aligned with the tool, marks were abiout a quarter out.



  windy

I use the same exact tool, and my initial findings  were exactly as yours and readjusted accordingly

[Leo167]

Originally Posted by esso_sa

For some reason there are 2 rear axle torque specs for Gen 2.
2020 production year (like mine) are 100 Nm in the user manual.
2021+ models are 125 Nm
I dont’t know if there are any axle differences between 2020 and 2020+ models, but for some reason BMW changed the rear axle torque values.
I do mine at 100 Nm. There aren’t any numbers stamped on my axle bolts

Re the wheel/chain alignment, I don’t use the axle marks as a reference. I use the vernier caliper and measure how much the adjusting bolts are unscrewed from the axle and then make sure both sides are exactly the same

maybe I downloaded the wrong Gen 2 manual?
Anyway will confirm when I get home… maybe I need new glasses as well??
The caliper thing… just to much work for me, the motion pro stick has worked for me for many years

[capt cf]

Both my owner's manual and service manual for gen 2 say 125 nm.

EDIT - mine is a 2021 (so post 2020 manuals)

[esso_sa]

Originally Posted by Leo167

maybe I downloaded the wrong Gen 2 manual?
Anyway will confirm when I get home… maybe I need new glasses as well??
The caliper thing… just to much work for me, the motion pro stick has worked for me for many years

There are 2 user manuals - pre and post 2020.
The one pre 2020 says 100 Nm, while the later one says 125 Nm
You can see which version of owners manual you’ve got with the bike (or downloaded). It is stamped on the last page.
My bike is manufactured in May 2020, and the owners manual I got with it is:
Order No.: 01 40 5 A01 801
07.2019, 1st edition, 01

This manual says 100 Nm

[Leo167]

Originally Posted by esso_sa

There are 2 user manuals - pre and post 2020.
The one pre 2020 says 100 Nm, while the later one says 125 Nm
You can see which version of owners manual you’ve got with the bike (or downloaded). It is stamped on the last page.
My bike is manufactured in May 2020, and the owners manual I got with it is:
Order No.: 01 40 5 A01 801
07.2019, 1st edition, 01

This manual says 100 Nm

My bike is a 2022- So, the E manual I grabbed from the web is exactly what you described and not the correct manual for a 22



And does state 100Nm




Thank you for the education, I'm glad to say that I have not lost my mind and seeing imaginary torque values...