7/1/2021

33 03 21_JUDDER DAMPER: TORSIONAL PLAY IN THE REAR WHEEL

SIB 33 03 21
JUDDER DAMPER: TORSIONAL PLAY IN THE REAR WHEEL

2021-06-02

MODEL
E-Series
K63
K66
K67
K69

Model Description
S 1000 R
M 1000 RR
S 1000 RR
S 1000 XR

SITUATION
The presence of torsional play is noticed between the chain sprocket support and the judder dampers/rear
wheel, as shown in the attachments. The play is noticeable even though no wear is seen on the judder
dampers and components.
Please note that judder dampers are designed to settle in during the first 600-1200 miles of utilization, after
which the settling should stop. The play should not increase past the allowed tolerance of 3mm.
As designed, the judder dampers are an extremely tight fit into the wheels when they’re new.

PROCEDURE
Please measure the circumferential backlash (play in the rotation of the wheel vs sprocket) twice at 180°
intervals as shown in the attached instructions.
A torsional backlash of up to 3.0 mm is acceptable and replacement of the judder dampers is not
recommended, as a torsional backlash within this tolerance will occur again within a short usage.
If the circumferential backlash is more than the allowed tolerance of 3mm, please create a TSARA case and
attach the values measured in millimeters.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Motorcycles, if applicable.

QUESTIONS REGARDING THIS BULLETIN
Technical inquiries
Warranty inquiries
Parts inquiries

Contact the BMW Technical Support Group via TSARA
Submit an IDS ticket to the Warranty Department
Submit an IDS ticket to the Motorrad Parts Department

Supporting Materials
picture_as_pdf 33 03 21 JUDDER DAMPER TORSIONAL PLAY IN THE REAR WHEEL.pdf
insert_drive_file IMG_3725.jpg
picture_as_pdf Testing Play in Judder Dampers.pdf
Videos
330121

Copyright ©2021 MOTORRAD USA, a division of BMW of North America, LLC. All Rights Reserved
1/1

Service Information Bulletin

June 2, 2021

Rear Axle, Rear Drive

33 03 21

JUDDER DAMPER: TORSIONAL PLAY IN THE
REAR WHEEL
MODEL
E-Series
K63
K66
K67
K69

Model Description
S 1000 R
M 1000 RR
S 1000 RR
S 1000 XR

SITUATION
The presence of torsional play is noticed between the chain sprocket support and the judder
dampers/rear wheel, as shown in the attachments. The play is noticeable even though no wear is
seen on the judder dampers and components.
Please note that judder dampers are designed to settle in during the first 600-1200 miles of utilization,
after which the settling should stop. The play should not increase past the allowed tolerance of 3mm.
As designed, the judder dampers are an extremely tight fit into the wheels when they’re new.

PROCEDURE
Please measure the circumferential backlash (play in the rotation of the wheel vs sprocket) twice at
180° intervals as shown in the attached instructions.
A torsional backlash of up to 3.0 mm is acceptable and replacement of the judder dampers is not
recommended, as a torsional backlash within this tolerance will occur again within a short usage.
If the circumferential backlash is more than the allowed tolerance of 3mm, please create a TSARA
case and attach the values measured in millimeters.

WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty for Motorcycles, if applicable.

QUESTIONS REGARDING THIS BULLETIN
Technical inquiries
Warranty inquiries
Parts inquiries

Contact the BMW Technical Support Group via TSARA
Submit an IDS ticket to the Warranty Department
Submit an IDS ticket to the Motorrad Parts Department

© 2021, BMW of North America, LLC. The contents of this document are confidential and should not be shared with third
parties for distribution. All pricing subject to change.
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7/1/2021

https://tisnet.bmwgroup.net/sib_attachments/IMG_3725.jpg

IMG_3725.jpg (480×640)

1/1

Erprobung Antrieb
BMW Motorrad
EX-EA-4

Funktionstest
Functional test

Test: Verdreh-Spiel Rückdämpfer / Torsion-Clearance absorber RR wheel
1. Ziel
Hiermit soll das mögliche Spiel –aufgrund von
This is to determine the possible torsion-clearance Verschleiß an den Rückdämpfer- zwischen Felge und
caused by abrasion on absorber RR wheel – between rim
Kettenradträger ermittelt werden:
and chain wheel mount:
 Für die Messung ist der Neutral-Gang
 For measuring the neutral gear has to be
einzulegen.
engaged.
 Kettenrad jeweils einmal auf rechten und einmal
 Turning chain wheel once on a right and once on
auf linken Anschlag drehen und den
a left stop and carrying out the measurement
Messvorgang jeweils für jede Seite separat
process for every side respectively separately.
durchführen. Dafür muss beim zweiten
For this a new marking must be put at the
Messvorgang eine neue Markierung gesetzt
second measurement process.
werden.
 In presence of clearance, measurements should
 Bei vorhandenem Spiel sollte die Messung bei
be carried out by each 5000 km.
Möglichkeit jede 5.000 km durchgeführt werden.

2. Durchführungsbeschreibung
2.1 Fahrzeug aufbocken auf Hauptständer oder
aufstellen auf Seitenständer  Hinterradbremse für die
weiteren Schritte betätigen.

2.1 Jacking up vehicle on main columns or setting up
on prop stand  rear brake must be applied during the
measuring.

2.2 Drehmomentschlüssel auf 20 Nm einstellen.

2.2 Adjusting torque wrench on 20 Nm.

2.3 Mutter für die Prüfung markieren
- alle Messungen müssen an der gleichen Stelle
durchgeführt werden.

2.3 Marking nut for the measurement
- whole measurement has to be carried out at the same
place.

Seite 1 von 3

Erprobung Antrieb
BMW Motorrad
EX-EA-4

Funktionstest
Functional test

2.4. Sekundärtrieb mit Drehmoment- Schlüssel
vorspannen (20 Nm)

2.4 Turn screw (marked nut) with torque wrench
(20Nm) to tension the system.

2.5. Markierung am Rad und KRT bei vorgespanntem
Sekundärtrieb setzen:
- dafür einen Lack-Stift verwenden und nach dem
trocknen mit dem Reißnadel einen Dünnen Strich
setzen

2.5 Marking chain wheel and chain wheel mount
with white touch-up pencil while system is
tensioned:
- after drying: a thin line must be “scratched” on
white markings with a scriber

2.6 Sekundärtrieb mit Drehmoment- Schlüssel in
der anderen Drehrichtung spannen (20 Nm).

2.6 Turn Screw (marked Nut) in opposite direction
as 4. with torque wrench (20Nm).

Seite 2 von 3

Erprobung Antrieb
BMW Motorrad
EX-EA-4

Funktionstest
Functional test

2.7 Messung zwischen Rad und KRT an den gesetzten
Striche bei vorgespanntem Sekundärtrieb durchführen:
- die Messungen in einer Tabelle mit V-Nummer der
Fzg. und Laufleistung festschreiben

2.7 Measuring distance (f.e. with calliper) between
the two thin lines on chain wheel and chain wheel
mount while system is tensioned:
- list all measurements in a table including Vnumber and mileage of vehicle

2.8 Zweite Messung (2.4 bis 2.7) mit Anschlag auf
andere Seite wie bei erster Messung.

2.8 Second measuring (2.4 to 2.7) with stop on
other side than first measurement.

7. Bestätigung der Durchführung
Name:

Datum:

Kurzzeichen/Firma:

Unterschrift:

Seite 3 von 3