# Service bulletin M1722

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11032457
- Published by NHTSA: 2026\-05\-08
- Manufacturer's number: M1722
- Manufacturer's date: 2026\-04\-17
- NHTSA component: UNKNOWN OR OTHER; ENGINE; FUEL/PROPULSION SYSTEM; POWER TRAIN; VEHICLE SPEED CONTROL

## NHTSA's summary

SERVICE BULLETIN M1722 \(REV A\): EXHAUST SMOKE, OIL CARRY\-OVER OR MILKY OIL \(M8 MODELS WITH TRANSMISSION\-MOUNTED BREATHER\). PURPOSE: Revision A. Purpose for Service Bulletin. This bulletin informs dealers about: • The cause and effects of moisture in engine oil. • Service Manual troubleshooting updates for Milwaukee\-Eight engines with the transmission\-mounted breather, that have symptoms of moisture in oil and the best practices to avoid creating such instances. • New Job Time Code \(JTC 3017 Diagnose Oil Carryover/Moisture\) for service manual troubleshooting.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032457-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11032457-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Fuel system, Throttle and cruise control, Transmission and driveline

## Vehicles listed

- 2025 to 2026 HARLEY\-DAVIDSON FLFB
- 2025 to 2026 HARLEY\-DAVIDSON FLHC
- 2026 HARLEY\-DAVIDSON FLHLT
- 2026 HARLEY\-DAVIDSON FLHLTSE
- 2024 to 2025 HARLEY\-DAVIDSON FLHP
- 2024 to 2025 HARLEY\-DAVIDSON FLHRXS
- 2024 HARLEY\-DAVIDSON FLHTK
- 2024 to 2025 HARLEY\-DAVIDSON FLHTP
- 2024 to 2026 HARLEY\-DAVIDSON FLHX
- 2026 HARLEY\-DAVIDSON FLHXL
- 2026 HARLEY\-DAVIDSON FLHXLSE
- 2023 to 2026 HARLEY\-DAVIDSON FLHXSE
- 2026 HARLEY\-DAVIDSON FLHXSTSE
- 2025 HARLEY\-DAVIDSON FLHXU
- 2025 HARLEY\-DAVIDSON FLSTFI
- 2024 HARLEY\-DAVIDSON FLTRK
- 2023 HARLEY\-DAVIDSON FLTRKSE ANV
- 2024 to 2026 HARLEY\-DAVIDSON FLTRT
- 2024 to 2026 HARLEY\-DAVIDSON FLTRX
- 2026 HARLEY\-DAVIDSON FLTRXL
- 2024 to 2026 HARLEY\-DAVIDSON FLTRXP
- 2025 HARLEY\-DAVIDSON FLTRXRRSE
- 2023 to 2025 HARLEY\-DAVIDSON FLTRXSE
- 2023 to 2026 HARLEY\-DAVIDSON FLTRXSTSE
- 2025 to 2026 HARLEY\-DAVIDSON FXBB
- 2025 to 2026 HARLEY\-DAVIDSON FXBR
- 2025 to 2026 HARLEY\-DAVIDSON FXLRS
- 2025 to 2026 HARLEY\-DAVIDSON FXLRST

JSON: [/v1/bulletins/11032457](/v1/bulletins/11032457)

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