# Service bulletin M1650 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: 11014014 - Published by NHTSA: 2025\-02\-08 - Manufacturer's number: M1650 - Manufacturer's date: 2025\-01\-24 - NHTSA component: FUEL/PROPULSION SYSTEM; UNKNOWN OR OTHER; VEHICLE SPEED CONTROL; POWER TRAIN; ENGINE ## NHTSA's summary SERVICE BULLETIN M1650: MILWAUKEE EIGHT AND TWIN CAM CAMSHAFT DRIVE GEAR RETENTION KIT CHANGES. PURPOSE: This bulletin informs dealers that changes have been made to the Camshaft Drive Gear Retention Kit and service proceduresfor the Milwaukee\-Eight and Twin Cam applications. In an effort to increase the clamp load of the camshaft drive sprocket bolted joint and prevent the drive bolt from loosening in high lift camshaft applications, the following changes have been made: a. The camshaft drive bolt final torque has been increased to 40 ft\-lbs \(54 N·m\) for all Milwaukee\-Eight and certain Twin Cams models. See Vehicles Affected. This increase in torque will make the bolt a one time use application. Never re\-use a camshaft drive bolt for service after tightening to the increased specification. See service manual for updated procedure. b. A new camshaft drive gear retention kit \(Part No. 91800088\) has been created. This new kit is compatible with all Milwaukee\-Eight and Twin Cam engines using Parts and Accessories \(P\&A\) camshaft and Original Equipment \(OE\) camshaft applications. See Instruction sheet for specific fitment on Twin Cam OE camshaft applications. The new kit utilizes friction washers to prevent unwanted rotation of components in the drive sprocket bolted joint under stress. The use of liquid threadlocker on the threads of the bolt and pre\-lube to the head of the bolt flange and outside of the washer help the bolt reach full stretch when tightening. NOTE: Engines produced at all Harley\-Davidson Motor Company \(HDMC\) plants will not come with the new kits installed. They will continue to be produced with \(Part No. 25566\-06\). ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014014-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11014014-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Engine, Fuel system, Throttle and cruise control, Transmission and driveline ## Vehicles listed - 2012 HARLEY\-DAVIDSON FLD - 2014 to 2016 HARLEY\-DAVIDSON FLD - 2017 to 2020 HARLEY\-DAVIDSON FLDE - 2018 to 2019 HARLEY\-DAVIDSON FLFB - 2018 to 2024 HARLEY\-DAVIDSON FLFBS - 2018 HARLEY\-DAVIDSON FLFBS ANV - 2018 HARLEY\-DAVIDSON FLFBS ANX - 2020 HARLEY\-DAVIDSON FLFBSANV - 2023 HARLEY\-DAVIDSON FLFBSANV - 2021 HARLEY\-DAVIDSON FLH - 2017 to 2021 HARLEY\-DAVIDSON FLHC - 2018 to 2024 HARLEY\-DAVIDSON FLHCS - 2018 HARLEY\-DAVIDSON FLHCS ANV - 2023 HARLEY\-DAVIDSON FLHCS ANV - 2023 HARLEY\-DAVIDSON FLHFB - 2007 to 2024 HARLEY\-DAVIDSON FLHP - 2007 to 2011 HARLEY\-DAVIDSON FLHPE - 2007 to 2022 HARLEY\-DAVIDSON FLHR - 2011 HARLEY\-DAVIDSON FLHR103 - 2013 HARLEY\-DAVIDSON FLHR103 - 2007 to 2011 HARLEY\-DAVIDSON FLHRC - 2013 to 2016 HARLEY\-DAVIDSON FLHRC - 2011 to 2012 HARLEY\-DAVIDSON FLHRC103 - 2007 to 2008 HARLEY\-DAVIDSON FLHRS - 2013 to 2014 HARLEY\-DAVIDSON FLHRSE - 2007 HARLEY\-DAVIDSON FLHRSE3 - 2008 HARLEY\-DAVIDSON FLHRSE4 - 2011 HARLEY\-DAVIDSON FLHRUSE - 2011 HARLEY\-DAVIDSON FLHRX103 - 2017 to 2024 HARLEY\-DAVIDSON FLHRXS - 2007 to 2010 HARLEY\-DAVIDSON FLHT - 2019 to 2022 HARLEY\-DAVIDSON FLHT - 2007 to 2013 HARLEY\-DAVIDSON FLHTC - 2011 to 2012 HARLEY\-DAVIDSON FLHTC103 - 2007 to 2011 HARLEY\-DAVIDSON FLHTCU - 2013 to 2019 HARLEY\-DAVIDSON FLHTCU - 2014 to 2015 HARLEY\-DAVIDSON FLHTCU TC - 2011 to 2014 HARLEY\-DAVIDSON FLHTCU103 - 2009 HARLEY\-DAVIDSON FLHTCUH - 2015 to 2017 HARLEY\-DAVIDSON FLHTCUL - 2015 HARLEY\-DAVIDSON FLHTCUL TC - 2007 HARLEY\-DAVIDSON FLHTCUSE2 - 2008 HARLEY\-DAVIDSON FLHTCUSE3 - 2009 HARLEY\-DAVIDSON FLHTCUSE4 - 2010 HARLEY\-DAVIDSON FLHTCUSE5 - 2011 HARLEY\-DAVIDSON FLHTCUSE6 - 2012 HARLEY\-DAVIDSON FLHTCUSE7 - 2013 HARLEY\-DAVIDSON FLHTCUSE8 - 2017 HARLEY\-DAVIDSON FLHTCUTC - 2009 to 2024 HARLEY\-DAVIDSON FLHTCUTG - 2018 HARLEY\-DAVIDSON FLHTCUTG ANV - 2023 HARLEY\-DAVIDSON FLHTCUTGANV - 2019 to 2022 HARLEY\-DAVIDSON FLHTCUTGSE - 2009 to 2024 HARLEY\-DAVIDSON FLHTK - 2018 HARLEY\-DAVIDSON FLHTK ANV - 2020 to 2023 HARLEY\-DAVIDSON FLHTK SHRINE - 2023 HARLEY\-DAVIDSON FLHTKANV - 2015 to 2019 HARLEY\-DAVIDSON FLHTKL - 2014 to 2021 HARLEY\-DAVIDSON FLHTKSE - 2018 HARLEY\-DAVIDSON FLHTKSE ANV - 2007 to 2024 HARLEY\-DAVIDSON FLHTP - 2009 HARLEY\-DAVIDSON FLHTPH - 2007 to 2023 HARLEY\-DAVIDSON FLHX - 2008 HARLEY\-DAVIDSON FLHX ANV - 2018 HARLEY\-DAVIDSON FLHX ANV - 2018 HARLEY\-DAVIDSON FLHX ANX - 2011 to 2014 HARLEY\-DAVIDSON FLHX103 - 2014 to 2023 HARLEY\-DAVIDSON FLHXS - 2023 HARLEY\-DAVIDSON FLHXSANV - 2010 HARLEY\-DAVIDSON FLHXSE - 2015 to 2022 HARLEY\-DAVIDSON FLHXSE - 2011 HARLEY\-DAVIDSON FLHXSE2 - 2012 HARLEY\-DAVIDSON FLHXSE3 - 2022 to 2023 HARLEY\-DAVIDSON FLHXST - 2010 to 2012 HARLEY\-DAVIDSON FLHXXX - 2024 HARLEY\-DAVIDSON FLI - 2015 to 2024 HARLEY\-DAVIDSON FLRT - 2013 HARLEY\-DAVIDSON FLS - 2017 HARLEY\-DAVIDSON FLS - 2015 to 2016 HARLEY\-DAVIDSON FLS103 - 2018 to 2022 HARLEY\-DAVIDSON FLSB - 2018 to 2021 HARLEY\-DAVIDSON FLSL - 2016 to 2017 HARLEY\-DAVIDSON FLSS - 2007 HARLEY\-DAVIDSON FLST - 2007 to 2017 HARLEY\-DAVIDSON FLSTC - 2007 to 2011 HARLEY\-DAVIDSON FLSTF - 2016 to 2017 HARLEY\-DAVIDSON FLSTF - 2015 HARLEY\-DAVIDSON FLSTF103 - 2010 to 2017 HARLEY\-DAVIDSON FLSTFB - 2016 to 2017 HARLEY\-DAVIDSON FLSTFBS - 2007 to 2017 HARLEY\-DAVIDSON FLSTN - 2014 to 2015 HARLEY\-DAVIDSON FLSTNSE - 2008 to 2011 HARLEY\-DAVIDSON FLSTSB - 2007 HARLEY\-DAVIDSON FLSTSC - 2010 HARLEY\-DAVIDSON FLSTSE - 2011 HARLEY\-DAVIDSON FLSTSE2 - 2012 HARLEY\-DAVIDSON FLSTSE3 - 2007 to 2009 HARLEY\-DAVIDSON FLTR - 2020 to 2024 HARLEY\-DAVIDSON FLTRK - 2022 HARLEY\-DAVIDSON FLTRKSE - 2023 HARLEY\-DAVIDSON FLTRKSE ANV - 2009 HARLEY\-DAVIDSON FLTRSE3 - 2023 to 2024 HARLEY\-DAVIDSON FLTRT - 2010 to 2011 HARLEY\-DAVIDSON FLTRU - 2013 HARLEY\-DAVIDSON FLTRU - 2016 to 2019 HARLEY\-DAVIDSON FLTRU - 2011 to 2013 HARLEY\-DAVIDSON FLTRU103 - 2011 HARLEY\-DAVIDSON FLTRUSE - 2015 to 2016 HARLEY\-DAVIDSON FLTRUSE - 2010 to 2011 HARLEY\-DAVIDSON FLTRX - 2013 HARLEY\-DAVIDSON FLTRX - 2015 to 2023 HARLEY\-DAVIDSON FLTRX - 2011 to 2013 HARLEY\-DAVIDSON FLTRX103 - 2024 HARLEY\-DAVIDSON FLTRXP - 2015 to 2023 HARLEY\-DAVIDSON FLTRXS - 2023 HARLEY\-DAVIDSON FLTRXSANV - 2012 HARLEY\-DAVIDSON FLTRXSE - 2018 to 2022 HARLEY\-DAVIDSON FLTRXSE - 2013 HARLEY\-DAVIDSON FLTRXSE2 - 2022 to 2023 HARLEY\-DAVIDSON FLTRXST - 2023 HARLEY\-DAVIDSON FLTRXSTSE - 2018 to 2020 HARLEY\-DAVIDSON FXBB - 2021 to 2024 HARLEY\-DAVIDSON FXBBS - 2018 to 2019 HARLEY\-DAVIDSON FXBR - 2023 to 2024 HARLEY\-DAVIDSON FXBR - 2018 to 2020 HARLEY\-DAVIDSON FXBRS - 2022 to 2023 HARLEY\-DAVIDSON FXBRS - 2018 HARLEY\-DAVIDSON FXBRS ANX - 2007 to 2009 HARLEY\-DAVIDSON FXCW - 2008 to 2011 HARLEY\-DAVIDSON FXCWC - 2006 to 2010 HARLEY\-DAVIDSON FXD - 2006 HARLEY\-DAVIDSON FXD35 - 2007 to 2018 HARLEY\-DAVIDSON FXDB - 2016 HARLEY\-DAVIDSON FXDBC 103 - 2006 HARLEY\-DAVIDSON FXDBI - 2013 HARLEY\-DAVIDSON FXDBP - 2016 to 2017 HARLEY\-DAVIDSON FXDBP 103 - 2006 to 2014 HARLEY\-DAVIDSON FXDC - 2006 HARLEY\-DAVIDSON FXDCI - 2008 to 2017 HARLEY\-DAVIDSON FXDF - 2009 HARLEY\-DAVIDSON FXDFSE - 2010 HARLEY\-DAVIDSON FXDFSE2 - 2006 HARLEY\-DAVIDSON FXDI - 2006 to 2017 HARLEY\-DAVIDSON FXDL - 2006 HARLEY\-DAVIDSON FXDLI - 2016 to 2017 HARLEY\-DAVIDSON FXDLS - 2019 to 2020 HARLEY\-DAVIDSON FXDRS - 2007 HARLEY\-DAVIDSON FXDSE - 2008 HARLEY\-DAVIDSON FXDSE2 - 2007 to 2008 HARLEY\-DAVIDSON FXDWG - 2010 to 2011 HARLEY\-DAVIDSON FXDWG - 2013 to 2014 HARLEY\-DAVIDSON FXDWG - 2016 to 2017 HARLEY\-DAVIDSON FXDWG - 2006 HARLEY\-DAVIDSON FXDWGI - 2018 to 2019 HARLEY\-DAVIDSON FXFB - 2018 to 2023 HARLEY\-DAVIDSON FXFBS - 2018 to 2020 HARLEY\-DAVIDSON FXLR - 2020 to 2024 HARLEY\-DAVIDSON FXLRS - 2022 to 2024 HARLEY\-DAVIDSON FXLRST - 2022 HARLEY\-DAVIDSON FXRST - 2011 to 2012 HARLEY\-DAVIDSON FXS - 2013 to 2018 HARLEY\-DAVIDSON FXSB - 2013 to 2014 HARLEY\-DAVIDSON FXSBSE - 2016 to 2017 HARLEY\-DAVIDSON FXSE - 2007 to 2011 HARLEY\-DAVIDSON FXST - 2020 to 2024 HARLEY\-DAVIDSON FXST - 2007 to 2009 HARLEY\-DAVIDSON FXSTB - 2007 to 2010 HARLEY\-DAVIDSON FXSTC - 2007 HARLEY\-DAVIDSON FXSTD - 2007 HARLEY\-DAVIDSON FXSTS - 2007 HARLEY\-DAVIDSON FXSTSSE - 2008 HARLEY\-DAVIDSON FXSTSSE2 - 2009 HARLEY\-DAVIDSON FXSTSSE3 JSON: [/v1/bulletins/11014014](/v1/bulletins/11014014) [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%20M1650&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F11014014&vehicle=Service%20bulletin%20M1650)