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Service bulletin 1HD-R5V4K-09

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10117893
Published by NHTSA2017-09-20
Manufacturer's number1HD-R5V4K-09
Manufacturer's date2017-09-01
NHTSA componentFUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY:FILLER PIPE AND CAP

NHTSA's summary

SERVICE BULLETIN M1451: ACCESSORY FUEL CAP FITMENT. Accessory fuel caps manufactured before model year 2018 should not be used on 2018 and later Softail® motorcycles. While these accessory fuel caps will physically fit the model year 2018 Softail models, they will not meet certain regulatory functional requirements. 2018 and later Softail models must use updated fuel caps which are identifiable by the gray colored threads. The updated fuel caps will retrofit on previous model year motorcycles.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Fuel system, Fuel tank

Vehicles listed
HARLEY-DAVIDSON FLSL2018
HARLEY-DAVIDSON FLSTN2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.