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July 1, 2025 Service bulletin

Milwaukee-eight transmission shift drum update

Harley-Davidson technical service bulletin M1611 for 2017-2019 Harley-Davidson Flhtcu, 2017-2024 Harley-Davidson FLHX and 2017-2024 Harley-Davidson Flhtk and others.

Bulletin number
M1611
Component
Power train
Summary
SERVICE BULLETIN M1611 (REV B): MILWAUKEE-EIGHT TRANSMISSION SHIFT DRUM UPDATE. PURPOSE: Revision. This bulletin informs dealers that (Part No. 33900172) is obsolete. Dealers must purchase the updated bearing door when installing the new shift drum on 2017-2024 Milwaukee-Eight vehicles. Revision B. Updated: Required Dealer Action. Updated sentence for M8 Transmission built before Oct 4, 2023.

Owners of these vehicles have filed 89 complaints in the transmission category.

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