KTB2410 KTM TECHNICAL BULLETIN - USA

JULY 8, 2024

HANDLING CAMSHAFT DAMAGE
INFORMATION TYPE BULLETIN
AFFECTED MODELS:
2018 - 2020 790 ADVENTURE AND 790 ADVENTURE R
2018 - 2020 790 DUKE
BASIC INFORMATION:
Even though complaints have been reported about the camshafts on the 790 Duke/Adventure MY 2018- 2020
models, examinations of the allegedly defective camshafts have shown that a large proportion of these
camshafts are in order. In these cases, it is not a question of wear, but usually only of discoloration or running
marks that have formed on the running surface of the cams or on the bearing points of the shafts. To avoid
further unnecessary repairs and to counteract any inquiries, the following procedure has been defined:
If a customer comes to a dealer with the suspicion of damage to the camshaft, the dealer must first check
whether the oil level in the engine is correct, and the service history is complete. If the dealer suspects damage
to the camshaft, the dealer must carry out a test drive and check whether the following symptoms are present
cumulatively:


noticeably poor starting behavior



clearly audible, unusual running noises from the engine



noticeably reduced engine power

The symptoms are clearly recognizable:
If the above-mentioned Symptoms are clearly recognizable, it can be assumed that there is damage to the
camshafts and/or the finger followers.
Camshafts and finger followers must be checked for wear (see KTB2409 Limit pattern for camshaft wear
assessment) and damaged parts must be replaced. The engine oil and oil filter must also be changed as part
of the repair. The costs incurred will be borne by KTM under warranty or subsequently under goodwill.
Note: The warranty claim must be accompanied by informative pictures before and after cleaning the running
surfaces of the cams and the bearing points of the camshafts. In the event of unjustified warranty claims that
do not fulfill the criteria of this Technical Bulletin and KTB2409, the warranty claim will be charged back.

COPYRIGHT NOTICE: The user acknowledges that all components of this technical information are KTM’s and/or third parties’ copyright protected
property. Alteration, assignment, distribution and reproduction are forbidden.
LIMITATION OF LIABILITY: The information included in or available through this technical information may include inaccuracies or errors. In no event
shall KTM and/or its suppliers be liable for any damages whatsoever, arising out of or in connection with the use of this technical information. Please
always refer to the KTM owners and repair manuals for proper instructions or contact the KTM Dealer Services Department.

KTM NORTH AMERICA, INC.
30125 KTM Way // Murrieta, CA 92563
1119 Milan Avenue // Amherst, OH 44001
8701 Rue Samuel-Hatt // Chambly, QC J3L-6V4
www.ktm.com

1

DEALER SERVICES DEPARTMENT © 2024 KTM North America, Inc. – All rights reserved

No symptoms are recognizable:
If the above-mentioned Symptoms cannot be detected, no further inspection or repair is required. If the
customer nevertheless insists on an inspection being carried out, the customer must bear the costs of the
inspection himself.

KTB2410 KTM TECHNICAL BULLETIN - USA

JULY 8, 2024

PROCEDURE FOR REPAIR:
We shall not provide a description of general workshop methods. Likewise, safety rules that apply in a workshop
are not specified here. It is assumed that the repair work will be performed by a fully trained mechanic who has
completed training or has a corresponding qualification. In the event of uncertainty, the most recent repair
manual must be consulted.
In the interest of clarity, some components may be shown disassembled or may not be shown at all. It is not
always necessary to disassemble the component to perform the activity in question. Please follow the
instructions in the text.

Fig. 1: Discoloration and marks immediately after removal from the engine.
Fig. 2: Cleaning can completely remove the discoloration and traces. The surface of the camshaft is undamaged
and does not need to be replaced.

COPYRIGHT NOTICE: The user acknowledges that all components of this technical information are KTM’s and/or third parties’ copyright protected
property. Alteration, assignment, distribution and reproduction are forbidden.
LIMITATION OF LIABILITY: The information included in or available through this technical information may include inaccuracies or errors. In no event
shall KTM and/or its suppliers be liable for any damages whatsoever, arising out of or in connection with the use of this technical information. Please
always refer to the KTM owners and repair manuals for proper instructions or contact the KTM Dealer Services Department.

KTM NORTH AMERICA, INC.
30125 KTM Way // Murrieta, CA 92563
1119 Milan Avenue // Amherst, OH 44001
8701 Rue Samuel-Hatt // Chambly, QC J3L-6V4
www.ktm.com

2

DEALER SERVICES DEPARTMENT © 2024 KTM North America, Inc. – All rights reserved

In addition to KTB2409, the following images should be used as a basis for the decision:

KTB2410 KTM TECHNICAL BULLETIN - USA

JULY 8, 2024

Fig. 3: Despite cleaning, a clearly perceptible run-in mark remains, camshaft is worn.

DEALER SERVICES DEPARTMENT © 2024 KTM North America, Inc. – All rights reserved

Fig. 4: Despite cleaning, clearly visible pitting remains, camshaft is worn.

COPYRIGHT NOTICE: The user acknowledges that all components of this technical information are KTM’s and/or third parties’ copyright protected
property. Alteration, assignment, distribution and reproduction are forbidden.
LIMITATION OF LIABILITY: The information included in or available through this technical information may include inaccuracies or errors. In no event
shall KTM and/or its suppliers be liable for any damages whatsoever, arising out of or in connection with the use of this technical information. Please
always refer to the KTM owners and repair manuals for proper instructions or contact the KTM Dealer Services Department.

KTM NORTH AMERICA, INC.
30125 KTM Way // Murrieta, CA 92563
1119 Milan Avenue // Amherst, OH 44001
8701 Rue Samuel-Hatt // Chambly, QC J3L-6V4
www.ktm.com

3