# Service bulletin M1508

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: 11035943
- Published by NHTSA: 2026\-08\-06
- Manufacturer's number: M1508
- Manufacturer's date: 2026\-07\-30
- NHTSA component: VEHICLE SPEED CONTROL; ENGINE; FUEL/PROPULSION SYSTEM; POWER TRAIN; ELECTRICAL SYSTEM

## NHTSA's summary

SERVICE BULLETIN M1508 \(REV D\): 2009\-2025 TRIKE PLATFORM \- REVERSE MOTOR. PURPOSE: Revision C. To inform dealers of a running change for the new reverse motor \(Part No. 83388\-09C\) for Trike models. As of January 28, 2020 all Trike platform vehicles will be manufactured using the new reverse motor. The new reverse motor will be used to replace reverse motor assemblies \(Part No. 83388\-09, 83388\-09A,83388\-09B\) that have failed diagnostics. Refer to Table 3. This motor contains several improvements for better motor durability. A new procedure has been added, Refer to PINION EXTENDS BUT REVERSE MOTOR STALLS OR SPINS SLOWLY. REV D: Updated: Guide. Add link to: PINION EXTENDS BUT REVERSE MOTOR STALLS OR SPINS SLOWLY

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035943-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11035943-9999.pdf)

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

## Components

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

## Vehicles listed

- 2017 HARLEY\-DAVIDSON FLHTCUTC
- 2009 to 2025 HARLEY\-DAVIDSON FLHTCUTG
- 2018 HARLEY\-DAVIDSON FLHTCUTG ANV
- 2023 HARLEY\-DAVIDSON FLHTCUTGANV
- 2019 to 2022 HARLEY\-DAVIDSON FLHTCUTGSE
- 2010 to 2012 HARLEY\-DAVIDSON FLHXXX
- 2015 to 2025 HARLEY\-DAVIDSON FLRT
- 2023 to 2026 HARLEY\-DAVIDSON FLTRT

JSON: [/v1/bulletins/11035943](/v1/bulletins/11035943)

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