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Service bulletin SMT-TN-166

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 id10192922
Published by NHTSA2021-05-10
Manufacturer's numberSMT-TN-166
Manufacturer's date2016-03-01
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Crackshaft position sensor/ignition pickup, front brake hose p-clip, headlight fixings, reed valve cover torque fixing, engine bar plugs, lower yoke wire guide, front fork oil level and volume, motorcycle assembly guide update-backrest bar, rear bevel box parts kit, and pannier frame.

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

Engine

Vehicles listed
TRIUMPH BONNEVILLE2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
TRIUMPH BONNEVILLE A32015 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH BONNEVILLE T100 BLACK2017 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH BONNEVILLE T100 BLACK A32016 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH SCRAMBLER2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
TRIUMPH SCRAMBLER2018, 2019
TRIUMPH SCRAMBLER A22015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH THRUXTON2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014
TRIUMPH THRUXTON2016, 2017, 2018, 2019
TRIUMPH THRUXTON A22015 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH THRUXTON RS2020
TRIUMPH THUNDERBIRD1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
TRIUMPH THUNDERBIRD2010
TRIUMPH THUNDERBIRD2012, 2013, 2014
TRIUMPH THUNDERBIRD LT ABS A12015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH TIGER 800 XRX LRH2016 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH TIGER EXPLORER SPOKE ABS2015 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH TIGER EXPLORER XC2013, 2014 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH TIGER EXPLORER XC2017
TRIUMPH TROPHY2000
TRIUMPH TROPHY2012, 2013, 2014
TRIUMPH TROPHY SE2012, 2013, 2014, 2015 (the catalog's model; the bulletin names a series or trim of it)
TRIUMPH TROPHY SE A12015, 2016, 2017 (the catalog's model; the bulletin names a series or trim of it)

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

Recalls for the same vehicles and component
20V1500002020-03-17. ENGINE; ELECTRICAL SYSTEM:WIRING; SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS
18V0840002018-01-31. ENGINE AND ENGINE COOLING:ENGINE; ELECTRICAL SYSTEM:SOFTWARE
20144952014-11-03. Engine
20140082014-01-16. Engine
19990681999-04-27. Engine
99V0830001999-04-15. ENGINE AND ENGINE COOLING:ENGINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SMTTB2252023-02-06. Service bulletin. Technical Bulletin 225 provides instructions that applies to Triumph Diagnostic Tool 2022-07 Update - ECM Status Report Feature - Beta A, Triumph Diagnostic Tool 2022-07 Update - Introduction of New Headlight ECM Hardware, Triumph Diagnostic Tool 2022-07 Update - Calibrations Removed From Service.
SMT-COM012022-09-26. Service bulletin. Dealer notice reminding of the new California Prop 65 regulation.
SMTTB2252022-09-26. Service bulletin. Technical Bulletin 225 provides instructions that applies to Triumph Diagnostic Tool 2022-07 Update - ECM Status Report Feature - Beta A, Triumph Diagnostic Tool 2022-07 Update - Introduction of New Headlight ECM Hardware, Triumph Diagnostic Tool 2022-07 Update - Calibrations Removed From Service.
SMT-TN-1632021-05-10. Service bulletin. Mudgaurd alignment, sump, crankcase breather bolts, sump plug sealing washer, seat lock, drivebelt tension, reflector mounting o-rings, water inlet cover bolt and water outlet cover bolt, bleeding the brakes, and front inner wheel, inner tube and valve.
SMT-TN-1542021-05-10. Service bulletin. If a customer reports excessive top-end engine noise on an engine fitted to the above models up to VIN 602960, the dealer is requested to replace the cylinder head with a new cylinder head and camshaft drive chain tensioner following the procedure listed below.
SMT-TN-1532021-05-10. Service bulletin. If a Trophy or Trophy SE customer reports excessive top-end engine noise (a ticking and or knocking noise) on an engine fitted to the above models up to VIN 602960, the dealer is requested to arrange the return of the motorcycle to Triumph Motorcycles to permit factory repairs. This will include either a modification to the existing cylinder head or replacement cylinder head and replacement camshaft drive chain tensioner.
SMT-TN-1452021-05-10. Service bulletin. If a Tiger Explorer customer reports excessive top-end engine noise (a ticking and or knocking noise) on an engine fitted to the above models up to VIN 602960, the dealer is requested to arrange the return of the motorcycle to Triumph Motorcycles to permit factory repairs. This will include either a modification to the existing cylinder head or replacement cylinder head and replacement camshaft drive chain tensioner.
SMT-TN-1442021-05-10. Service bulletin. If a customer reports excessive top-end engine noise on an engine fitted to the above models up to VIN 602960, the dealer is requested to replace the cylinder head with a new cylinder head and camshaft drive chain tensioner following the procedure listed below.
SMT-TN-1392021-05-10. Service bulletin. A new sliding selector shaft and detent assembly has been introduced on the above models from engine number 563847. The new shaft is secured into the crankcase with E-clips and is not retrofittable. When ordering replacement parts, always refer to EPC.
SMT-TB201-20DEC22020-01-21. Service bulletin. Technical Bulletin 200 provides instructions that apply to Steering Lock and Keys, Neutral Position Adaption, Triumph Diagnostic Tool - End of Support for Microsoft Windows 7®, Triumph Diagnostic Tool - Internet Connection and Minimum eEquipment Requirement, Torque Change, Clutch Cable, Camshaft Frame Installation, Immobiliser Antenna Wire Routing.