# Service bulletin 1HD\-N3W5M\-08

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: 10115149
- Published by NHTSA: 2017\-08\-15
- Manufacturer's number: 1HD\-N3W5M\-08
- Manufacturer's date: 2015\-07\-25
- NHTSA component: ENGINE

## NHTSA's summary

SERVICE BULLETIN M1450: LOSS OF POWER ON 2017 MILWAUKEE\-EIGHT EQUIPPED WITH SCREAMIN' EAGLE STAGE III OR IV KITS. \[REVISION\] 2017 model motorcycles equipped with a Milwaukee\-Eight? engine and a Stage III or Stage IV kit can experience a condition known as Sumping during extended periods in low gear, at high rpm or under heavy engine load. Sumping is when an excessive amount of oil is suspended in the engine crankcase and the flywheel must travel through the oil, resulting in loss of power and potential engine component damage with extended use under these conditions. This bulletin provides the diagnostic procedure for determining if sumping is occurring. This information applies to all MY2017 Touring, CVO, Trike and Touring Police model motorcycles with a Milwaukee\-Eight engine and a Stage III or Stage IV kit installed.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2015/MC-10115149-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2015/MC-10115149-0001.pdf)

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

## Components

Engine

## Vehicles listed

- HARLEY\-DAVIDSON HARLEY DAVIDSON

JSON: [/v1/bulletins/10115149](/v1/bulletins/10115149)

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