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Service bulletin M1080

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 id607356
Published by NHTSA1999-09-21
Manufacturer's numberM1080
Manufacturer's date1999-05-17
NHTSA componentPOWER TRAIN:CLUTCH ASSEMBLY

NHTSA's summary

HARLEY DAVIDSON HAS LEARNED THAT COMPRESSION OF THE CLUTCH INSPECTION COVER O-RING ON SOME VEHICLES WITH 1998 AND EARLIER EVOLUTION ENGINES CAN LEAD TO DISTORTION OF THE COVER RESULTING IN LEAKAGE OF THE PRIMARY CHAINCASE LUBRICANT. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Clutch

Vehicles listed
HARLEY-DAVIDSON HARLEY DAVIDSON

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