TSB: TRIUMPH 955 I DAYTONA, ADVENTURER, ADVENTURER (SF), ADVENTURER (SN), AMERICA, BONNEVILLE, BONNEVILLE 908MD, BONNEVILLE AMERICA, BONNEVILLE T100, BONNEVILLE T100 908MF, DAYTONA, DAYTONA 1200, DAYTONA 900, DAYTONA 955, DAYTONA 955 (NB) SGL, DAYTONA 955 (NS), DAYTONA 955 SGL, DAYTONA 955I, DAYTONA CENTENNIAL, DAYTONA T595, LEGEND, LEGEND TT, ROCKET III ROADSTER ABS A, SPEED FOUR, SPEED FOUR T806LB, SPEED TRIPLE, SPEED TRIPLE (NC) SGL, SPEED TRIPLE 900, SPEED TRIPLE 955I, SPEED TRIPLE S, SPEED TRIPLE SGL, SPEEDMASTER, SPEEDMASTER 908ML, SPRINT 900, SPRINT RS, SPRINT RS (NR), SPRINT SPORT 900, SPRINT ST, SPRINT ST (NT), SPRINT TOURER 900, SUPER III 900, T509 SPEED TRIPLE, T595 DAYTONA, THUNDERBIRD, THUNDERBIRD SPORT, TIGER, TIGER (INJECTION), TIGER (NE), TIGER 900 CARBU, TRIDENT 900, TROPHY, TROPHY 1200, TROPHY 900, TT 600, TT600 (1995–2020)

Bulletin SMT-COM04-18MAY2 — May 18, 2021

Bulletin Details

Bulletin IDSMT-COM04-18MAY2
ManufacturerTRIUMPH
Models955 I DAYTONA, ADVENTURER, ADVENTURER (SF), ADVENTURER (SN), AMERICA, BONNEVILLE, BONNEVILLE 908MD, BONNEVILLE AMERICA, BONNEVILLE T100, BONNEVILLE T100 908MF, DAYTONA, DAYTONA 1200, DAYTONA 900, DAYTONA 955, DAYTONA 955 (NB) SGL, DAYTONA 955 (NS), DAYTONA 955 SGL, DAYTONA 955I, DAYTONA CENTENNIAL, DAYTONA T595, LEGEND, LEGEND TT, ROCKET III ROADSTER ABS A, SPEED FOUR, SPEED FOUR T806LB, SPEED TRIPLE, SPEED TRIPLE (NC) SGL, SPEED TRIPLE 900, SPEED TRIPLE 955I, SPEED TRIPLE S, SPEED TRIPLE SGL, SPEEDMASTER, SPEEDMASTER 908ML, SPRINT 900, SPRINT RS, SPRINT RS (NR), SPRINT SPORT 900, SPRINT ST, SPRINT ST (NT), SPRINT TOURER 900, SUPER III 900, T509 SPEED TRIPLE, T595 DAYTONA, THUNDERBIRD, THUNDERBIRD SPORT, TIGER, TIGER (INJECTION), TIGER (NE), TIGER 900 CARBU, TRIDENT 900, TROPHY, TROPHY 1200, TROPHY 900, TT 600, TT600
Model Years1995–2020
Date IssuedMay 18, 2021
Date Added to NHTSAJune 14, 2021
ComponentELECTRICAL SYSTEM
Vehicles Affected181 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

Dealer notice announcing the availability of Diagnostic software 2021-09 and dealers should begin using it immediately.

Affected Vehicles

MakeModelYearComponent
TRIUMPH SPEED TRIPLE S 2020 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE S 2019 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE S 2018 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE S 2017 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE S 2016 110000 ELECTRICAL SYSTEM
TRIUMPH ROCKET III ROADSTER ABS A 2011 110000 ELECTRICAL SYSTEM
TRIUMPH ROCKET III ROADSTER ABS A 2010 110000 ELECTRICAL SYSTEM
TRIUMPH AMERICA 2003 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE 2003 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE 908MD 2003 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE AMERICA 2003 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE T100 2003 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE T100 908MF 2003 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 2003 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 (NB) SGL 2003 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 SGL 2003 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA T595 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED FOUR 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED FOUR T806LB 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE (NC) SGL 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE SGL 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPEEDMASTER 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPEEDMASTER 908ML 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT RS 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT RS (NR) 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT ST 2003 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT ST (NT) 2003 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 2003 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD SPORT 2003 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 2003 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER (NE) 2003 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 2003 110000 ELECTRICAL SYSTEM
TRIUMPH TT 600 2003 110000 ELECTRICAL SYSTEM
TRIUMPH TT600 2003 110000 ELECTRICAL SYSTEM
TRIUMPH AMERICA 2002 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE 2002 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE 908MD 2002 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE AMERICA 2002 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE T100 2002 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE T100 908MF 2002 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 2002 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 2002 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 (NB) SGL 2002 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 (NS) 2002 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 SGL 2002 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA CENTENNIAL 2002 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA T595 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED FOUR 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED FOUR T806LB 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE (NC) SGL 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE SGL 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPEEDMASTER 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT RS 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT RS (NR) 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT ST 2002 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT ST (NT) 2002 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 2002 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 2002 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER (NE) 2002 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 2002 110000 ELECTRICAL SYSTEM
TRIUMPH TT 600 2002 110000 ELECTRICAL SYSTEM
TRIUMPH TT600 2002 110000 ELECTRICAL SYSTEM
TRIUMPH 955 I DAYTONA 2001 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER 2001 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER (SN) 2001 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE 2001 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE 908MD 2001 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 2001 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 2001 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955I 2001 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA CENTENNIAL 2001 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA T595 2001 110000 ELECTRICAL SYSTEM
TRIUMPH LEGEND 2001 110000 ELECTRICAL SYSTEM
TRIUMPH LEGEND TT 2001 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 2001 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 955I 2001 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT RS 2001 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT ST 2001 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 2001 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 2001 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER (INJECTION) 2001 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER (NE) 2001 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 2001 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 900 2001 110000 ELECTRICAL SYSTEM
TRIUMPH TT 600 2001 110000 ELECTRICAL SYSTEM
TRIUMPH TT600 2001 110000 ELECTRICAL SYSTEM
TRIUMPH 955 I DAYTONA 2000 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER 2000 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER (SN) 2000 110000 ELECTRICAL SYSTEM
TRIUMPH BONNEVILLE 2000 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 2000 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955I 2000 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA T595 2000 110000 ELECTRICAL SYSTEM
TRIUMPH LEGEND 2000 110000 ELECTRICAL SYSTEM
TRIUMPH LEGEND TT 2000 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 2000 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 955I 2000 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT RS 2000 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT ST 2000 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 2000 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD SPORT 2000 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 2000 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER (INJECTION) 2000 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 2000 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 2000 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 900 2000 110000 ELECTRICAL SYSTEM
TRIUMPH TT 600 2000 110000 ELECTRICAL SYSTEM
TRIUMPH TT600 2000 110000 ELECTRICAL SYSTEM
TRIUMPH 955 I DAYTONA 1999 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER 1999 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER (SN) 1999 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 1200 1999 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 1999 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955I 1999 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA T595 1999 110000 ELECTRICAL SYSTEM
TRIUMPH LEGEND 1999 110000 ELECTRICAL SYSTEM
TRIUMPH LEGEND TT 1999 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 1999 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 955I 1999 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT ST 1999 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 1999 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD SPORT 1999 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 1999 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER (INJECTION) 1999 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 1999 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 900 1999 110000 ELECTRICAL SYSTEM
TRIUMPH 955 I DAYTONA 1998 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER 1998 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER (SF) 1998 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 1998 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955I 1998 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA T595 1998 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 1998 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT SPORT 900 1998 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT TOURER 900 1998 110000 ELECTRICAL SYSTEM
TRIUMPH T509 SPEED TRIPLE 1998 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 1998 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD SPORT 1998 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 900 CARBU 1998 110000 ELECTRICAL SYSTEM
TRIUMPH TRIDENT 900 1998 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 1998 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 900 1998 110000 ELECTRICAL SYSTEM
TRIUMPH 955 I DAYTONA 1997 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER 1997 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER (SF) 1997 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955 1997 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 955I 1997 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA T595 1997 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 1997 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT 900 1997 110000 ELECTRICAL SYSTEM
TRIUMPH T509 SPEED TRIPLE 1997 110000 ELECTRICAL SYSTEM
TRIUMPH T595 DAYTONA 1997 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 1997 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 900 CARBU 1997 110000 ELECTRICAL SYSTEM
TRIUMPH TRIDENT 900 1997 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 1997 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 900 1997 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER 1996 110000 ELECTRICAL SYSTEM
TRIUMPH ADVENTURER (SF) 1996 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 1200 1996 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 900 1996 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 900 1996 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT 900 1996 110000 ELECTRICAL SYSTEM
TRIUMPH SUPER III 900 1996 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 1996 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 900 CARBU 1996 110000 ELECTRICAL SYSTEM
TRIUMPH TRIDENT 900 1996 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 1996 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 900 1996 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 1200 1995 110000 ELECTRICAL SYSTEM
TRIUMPH DAYTONA 900 1995 110000 ELECTRICAL SYSTEM
TRIUMPH SPEED TRIPLE 900 1995 110000 ELECTRICAL SYSTEM
TRIUMPH SPRINT 900 1995 110000 ELECTRICAL SYSTEM
TRIUMPH SUPER III 900 1995 110000 ELECTRICAL SYSTEM
TRIUMPH THUNDERBIRD 1995 110000 ELECTRICAL SYSTEM
TRIUMPH TIGER 900 CARBU 1995 110000 ELECTRICAL SYSTEM
TRIUMPH TRIDENT 900 1995 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 1200 1995 110000 ELECTRICAL SYSTEM
TRIUMPH TROPHY 900 1995 110000 ELECTRICAL SYSTEM

Related TRIUMPH Recalls

CampaignModelYearComponentSummary
TRIDENT 800 2026 EXTERIOR LIGHTING:HEADLIGHTS Triumph Motorcycles America, Ltd. is recalling certain 2026 Trident 800 motor...
BONNEVILLE T100 2022 ELECTRICAL SYSTEM:ALTERNATOR/GENERATO... Triumph Motorcycles America, Ltd. is recalling certain 2022-2024 Bonneville T...
SCRAMBLER 900 2024 ELECTRICAL SYSTEM:ALTERNATOR/GENERATO... Triumph Motorcycles America, Ltd. is recalling certain 2022-2024 Bonneville T...
STREET SCRAMBLER 2022 ELECTRICAL SYSTEM:ALTERNATOR/GENERATO... Triumph Motorcycles America, Ltd. is recalling certain 2022-2024 Bonneville T...
BONNEVILLE T100 2023 ELECTRICAL SYSTEM:ALTERNATOR/GENERATO... Triumph Motorcycles America, Ltd. is recalling certain 2022-2024 Bonneville T...

What Should You Do?

If your vehicle is affected by this TSB, contact your authorized TRIUMPH dealer. Bring this bulletin ID (SMT-COM04-18MAY2) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.