# Service bulletin KTB2106

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: 10203673
- Published by NHTSA: 2021\-12\-01
- Manufacturer's number: KTB2106
- Manufacturer's date: 2021\-04\-20
- NHTSA component: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER; SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

On affected motorcycles there is a possibility that the preload force of the return spring is too low and does not meet the specified tolerance. This could result in the brake piston not being returned to its original position which in rare cases can impair the function of the front brake. To ensure the highest level of safety, performance, reliability and customer satisfaction, it is necessary to replace the front brake master cylinder piston return spring on all affected motorcycles.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203673-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10203673-9999.pdf)

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

## Components

Brakes, Brake master cylinder

## Vehicles listed

- 2019 to 2020 KTM 790 ADVENTURE
- 2019 KTM 790 ADVENTURE R
- 2020 KTM 790 ADVENTURE R
- 2020 KTM 790 ADVENTURE R RALLY

## Recalls for the same vehicles and component

- [21V304000](/recalls/nhtsa/21V304000.md), 2021-04-30: SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:MASTER CYLINDER; SERVICE BRAKES, HYDRAULIC

JSON: [/v1/bulletins/10203673](/v1/bulletins/10203673)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20KTB2106&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10203673&vehicle=Service%20bulletin%20KTB2106)