# Service bulletin M1721

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: 11031173
- Published by NHTSA: 2026\-04\-08
- Manufacturer's number: M1721
- Manufacturer's date: 2026\-03\-19
- NHTSA component: POWER TRAIN; SERVICE BRAKES; UNKNOWN OR OTHER; ELECTRICAL SYSTEM; ENGINE

## NHTSA's summary

SERVICE BULLETIN M1721: UPDATES TO 2026 SOFTAIL SERVICE MANUAL. PURPOSE: Initial release. This bulletin informs dealers that the Regular Service Intervals table \(pages 2\-4 and 2\-5\) located within the printed 2026 Softail Service Manual \> Maintenance \> Maintenance Schedule section is incorrect. The table in the digital manual on Service Information Portal \(SIP\) is correct, as are the Maintenance Interval Checklists within the AMP system. Any printed Service Manuals ordered after March 2, 2026 contain the corrected tables.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031173-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11031173-9999.pdf)

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

## Components

Brakes, Electrical system, Engine, Transmission and driveline

## Vehicles listed

- 2026 HARLEY\-DAVIDSON FLFB
- 2026 HARLEY\-DAVIDSON FLHC
- 2026 HARLEY\-DAVIDSON FXBB
- 2026 HARLEY\-DAVIDSON FXBR
- 2026 HARLEY\-DAVIDSON FXLRS
- 2026 HARLEY\-DAVIDSON FXLRST

JSON: [/v1/bulletins/11031173](/v1/bulletins/11031173)

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