NHTSA ID Number: 10240311
Manufacturer Communication Number: SRV-SRB-23-037
TSB/Document Date: 2023-08-03
Summary
Finial Drive Chain Maintenance Precautions. Applicability: All Models and Model Years (except XDiavel). This Service Bulletin replaces and cancels the previous bulletins: SRV-SRB-18-030 published on 05/11/2018, SRV-SRB-19-046 published on 12/31/2019, SRV-SRB-20-050 published on 11/24/2020. It provides dealers and service managers additional final drive chain care to ensure optimum performance and longevity for the chain. this includes cleaning, lubricating, inspecting and tension guidelines.
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Date:
To:
From:
July 13, 2023
Dealer Principal, General Manager, Service Manager, North American Dealer
Network
Richard Kenton, Technical Director
Dan Schwartz, Service Area Manager
This Service Bulletin replaces and cancels the previous bulletins:
SRV-SRB-18-030 published on 05/11/2018
SRV-SRB-19-046 published on 12/31/2019
SRV-SRB-20-050 published on 11/24/2020
Dear Dealers,
We would like to provide you with more information for the proper maintenance of the final
drive chain installed on the entire Ducati
range in order to ensure top performance and a long
life of the chain itself.
Table of Contents
Page
2
Cleaning the Chain
Lubricating the Chain
2
Checking the Chain
5
Checking the Sprockets
9
Tensioning the Chain
11
Changing the Chain
16
General Information on Roller Chains
21
FAQ (Frequently Asked Questions)
24
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1/25
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Cleaning the Chain
The cleaning of the chain has a crucial importance for its life. It is necessary to use a jet of
water to remove any mud, soil, sand or dirt build-up. Then immediately dry the chain using
compressed air, blown from a distance of at least 12 in/30 cm.
NOTE
Avoid the use of steam, fuels, solvents, hard brushes or other methods that may
damage the O-rings; also avoid direct contact with the acid of the batteries as it could
cause small fractures of the links.
Once the chain has been washed and cleaned, it is possible to proceed with lubrication.
Lubricating the Chain
The pin-bushing area is the critical point where the greatest stresses occur due to high
operating loads and high temperatures are experienced: this will reduce the anti-wear effect
of the oil film present on all parts of the chain.
Lubricant
Bushing
Pin
Please be reminded that the O-Rings present in all OE chains of the Ducati models play a
twofold role as they hold the lubricant and avoid that any foreign objects enter the pinbushing area.
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
In case of poor lubrication, you might experience the following symptoms:
•
reddish areas (due to oxidation)
•
squeaks and noise
•
stretching
•
stiffer joints
Lubrication is very important as it:
•
reduces friction and heat build-up
•
keeps the O-Rings soft thereby avoiding cracking and consequent failure
•
protects against oxidation of metal parts
•
increases drive efficiency
•
increases the service life of the whole drive system
The chain can be lubricated either by brush or by spray according to the following two
methods:
Lubrication by brush:
When using a brush, just smear a film of oil throughout the length of the chain; then use a
clean cloth to eliminate any excess oil.
ATTENTION
Use mineral oil SAE 80W-90 or specific chain lubricants, making sure that they do not
contain any additives that might damage the O-rings.
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Lubrication by spray:
•
Position the motorcycle on the rear paddock stand
•
Quickly spin the rear wheel in the direction opposite to the direction of travel
•
Spray the lubricant inside the chain, between internal and external links, at the point
immediately upstream of the sprocket meshing point. Due to the centrifugal force, the
lubricant - made fluid by the solvents contained in the spray - will expand in the area
between the pin and the bushing, thereby ensuring perfect lubrication
•
Repeat the operation by aiming the lubricant spray pattern on the central part of the chain
in order to lubricate the rollers and on the external plates, as shown in the figure
•
When lubrication is completed, wait 10-15 minutes to allow the lubricant to spread on the
internal and external surfaces of the chain and then remove any excess lubricant with a
clean cloth.
NOTE
Lubricate the chain at least every 250mi/400 km or more frequently if the motorcycle
is used in conditions of high ambient temperature (105°F/40°C) or after long trips on
the highway at high speed.
Lubricate the chain without waiting for it to cool down after use, so that the new
lubricant can better go through the internal and external links and enhance its
protective action.
Do not use the motorcycle immediately after lubricating the chain as the lubricant
would still be fluid and it would hence be ejected outwards by centrifugal force,
possibly staining with oil the rear wheel or the rider foot peg.
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4/25
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Checking the Chain
The chain should be frequently inspected to ensure that there are no stiff joints, missing or
damaged O-rings or other worn-out components (especially the closing link).
The wear of a chain can easily be checked by measuring its stretch.
If the chain stretches beyond the expected limits, the kinematic mechanism will become
unreliable, the pitch will no longer be respected and the chain could jump on the next tooth of
the sprocket and cause its breakage.
For Off-Road use of the motorcycle, there may be excessive wear of the links due to the
contact with the chain guide shoe. The friction could in fact cause chain overheating that
would alter the heat treatment of the links making them particularly fragile. In extreme cases,
the link failure is vertical and the transversal cracks start from the base of the link and then
extend until they affect the seat of the pin.
To inspect the final drive chain stretch, follow the procedure below, using tool part no.
889450134 - Checking the chain wear.
On the tool there are three stages of chain stretch, represented by three different colors
corresponding to a defined percentage of the stretch itself as shown in the table:
Color
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Stretch
Green
-
Yellow
0.7 %
Red
1.2 %
5/25
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
NOTE
For a correct measurement of final drive chain stretch, we remind you that it is
necessary to tension the upper or lower section, depending on accessibility, by
engaging a low gear and turning the rear wheel with appropriate force, clockwise
or anticlockwise respectively.
WARNING
Tool part no. 889450134, with a thickness of 7 mm,
was originally designed for 530 chains only, making
it impossible to use on 520 chains. The tool has
recently been updated by reducing its thickness and
allowing it to be used with all currently used chain
versions.
Those in possession of the previous version of the
tool can replace it with the new one or proceed with
the reduction of the thickness to an overall
measurement of 5 mm.
1. Aim tool part no. 889450134 as shown in the figure by inserting the "fork" end at one of
the rollers of the chain tensioned section.
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
2. Insert the other end of tool part no. 889450134 between two consecutive rollers and take
the measurement in 4 points:
a) Should it not be possible to insert the end, then the tool will show the green color,
indicating that the chain has a length close to the nominal value.
b) If only part of the end can be inserted, then the tool will show the yellow color,
indicating a chain stretch percentage between 0.7% and 1.2%. In this case, proceed to
measure the stretch with the gauge as shown in the next paragraph.
c) If the end can be fully inserted, then the tool will show the red color, indicating a chain
stretch percentage equal to or higher than 1.2%, requiring the replacement.
a
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7/25
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Measuring the Final Drive Chain Stretch with a Gauge or Millimeter Scale Ruler
NOTE
Before measuring, it is necessary to properly clean and lubricate the drive chain.
1. With the chain mounted on the motorcycle, tension the upper or lower section by inserting
a low gear and turning the rear wheel clockwise or counterclockwise respectively.
2. Using a millimeter precision gauge or ruler, measure the distance between the centers of
two inner links (green color) separated by a “N” number of pins (red color) as shown
NOTE
The number of pins “N” to be considered for the measurement depends on the type of
chain.
Length to be measured
Number of pins
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Ensure that the measured value does not exceed the maximum acceptable length specified in
the table below:
Reference
Regina
International
standard
N
(number of pins)
Maximum acceptable
length
(chain with O-Rings)
135 – 136 – 136.2 – 137
520 – 525 – 530 – 532
16
25.6500 cm
The chain must be changed if measurement is greater than the maximum acceptable length.
In addition to measuring the length, a visual inspection of the plates, pins, O-rings and
bushings can be carried out to check chain wear.
If any of the following are present the drive chain must be replaced:
•
cracks on the plates
•
cracks on the pins
•
spinning pins
•
damaged O-Rings
•
scratched rollers
Checking the Sprockets
In order to guarantee top performance and a long life of the chain, it is necessary to
frequently check teeth wear on both sprockets, their profile and thickness and, if necessary,
proceed with the replacement. Sprocket teeth wear can be identified with a visual inspection
because worn teeth are typically shaped like a "hook".
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Tel. +1 650 933 9800
9/25
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
When installing new sprockets, it is necessary to turn the rear wheel and make sure that there
is no side clearance or runout while wheel is spinning. A misalignment could trigger axial
thrusts on the internal link of the chain, which can be detected by lateral wear of the teeth of
the sprockets.
NOTE
A new chain installed on worn or damaged sprockets will tend to get damaged quickly.
To obtain top performance, it is necessary to install new sprockets, thus obtaining the
same level of wear and reliability for all the components of the drive system.
Ducati North America
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1292 Reamwood Ave
Sunnyvale, CA 94089
Tel. +1 650 933 9800
10/25
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Tensioning the Chain
The correct tensioning of the chain is an extremely important factor for its life and efficiency.
The inspection and restoration of the proper chain tensioning must be carried out in case of
use:
•
•
On the road, after the first 60 mi/100 km and every 250 mi/400 km thereafter
Off-road, after each use
Checking Chain Correct Tensioning
1. Position the motorcycle on the rear paddock stand.
2. Find junction link and place it to the position corresponding to point (1) as shown in the
figure.
3. With just a finger, push down on the chain at the point of measurement indicated by the
arrow and then release.
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
4. Measure distance A between the pin center of the chain and the chain sliding shoe and
write the value measured in the table shown at step 8.
5. Turn the rear wheel counterclockwise so that the junction link is placed at the position
corresponding to point (2) as shown in the figure.
Repeat the procedure explained from step 3 to 4 and write the second value referred to
the A distance between the pin center of the chain and the chain sliding shoe in the table
shown at step 8.
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
6. Turn the rear wheel counterclockwise so that the junction link is placed at the position
corresponding to point (3) as shown in the figure.
Repeat the procedure explained from step 3 to 4 and write the second value referred to
the A distance between the pin center of the chain and the chain sliding shoe in the table
shown at step 8.
7. Turn the rear wheel counterclockwise so that the junction link is placed at the position
corresponding to point (4) as shown in the figure.
Repeat the procedure explained from step 3 to 4 and write the second value referred to
the A distance between the pin center of the chain and the chain sliding shoe in the table
shown at step 8.
Ducati North America
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
8. Fill in the following table with the 4 values referred to distance A between the pin center
of the chain and the chain sliding shoe in the 4 different measurements.
Measurement
Distance A (mm)
Measurement
1
3
2
4
Distance A (mm)
9. In the table shown on the previous step, find the greatest and the smallest values
referring to distance A found at the 4 different measurements.
If the difference between the maximum and the minimum value is:
a) ≤ 20 mm → proceed with final drive chain tensioning following the instructions below:
1) Based on the values shown in the table at step 8, turn the back wheel so as to
place the junction link at the point where the distance A minimum value has been
measured.
2) Remove the rear paddock stand and position the motorcycle on the side stand.
3) Push down the chain with just a finger at the point of measurement and then
release it.
4) Distance A between the pin center of the chain and the reference point indicated
on the adhesive label must be between the values shown. If not, adjust according
to the instructions in the workshop manual.
b) > 20 mm → replace the chain. ONLY in case of request of replacement under warranty,
fill in a Youtech service request and attach the table complete with the 4 values
referring to the distance A between the pin center of the chain and the chain sliding
shoe.
Ducati North America
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1292 Reamwood Ave
Sunnyvale, CA 94089
Tel. +1 650 933 9800
14/25
Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
NOTE
Depending on the various models, the correct chain tension value is specified in
Section 4: "Maintenance operations - Adjusting the chain tension" in the Workshop
Manual or refer to the relevant adhesive label on the swingarm.
WARNING
Excessive chain tensioning could cause an increase in the workload between the pins
and the bushings, overheating of the chain with early consumption of the lubricant
film and consequently a possible quick wear of the chain itself.
Here below are some phenomena that could occur in the event of incorrect tensioning of the chain:
1. Micro cracks in the chain rollers, which are not visible to the naked eye; however, when the
chain is inspected, deep scratches can be found on the roller surface.
2. Breakage of the link in the longitudinal direction due to excessive stress
3. Spinning pins
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Final Drive Chain Maintenance Precautions
All Models and Model Years (except XDiavel)
Service Repair Bulletin SRV-SRB-23-037
Changing the Chain
Any dedicated generic tool can be used to replace the final drive chain, as there is no specific
tool sold directly by Ducati for this operation.
After removing the chain master link, follow the procedure below:
1. Using a connecting link, connect one end of the chain to be replaced with the new chain.
2. Slowly pull the other end of the old chain until the new chain is wrapped around the front
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TSB/Document ID: SRV-SRB-23-037
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MFR Communication Date: 2023-07-13
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