Triumph Trident 660
Real ownership data from 9,010 UK Trident 660 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common Trident 660 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Brake discs and pads | major | 13.9% |
| Wheels | prs | 10.1% |
| Exhaust and emissions | major | 9% |
| Suspension | dangerous | 8.5% |
| Electrical | minor | 5.8% |
| Fluid leaks | fail | 5.6% |
| Frame and structure | major | 5.6% |
| Fuel system | major | 4.1% |
Advisories (wear noted but not failed) are excluded above; the most common is frame and structure.
Trident 660 mileage and reliability by year
Use this to judge whether a specific bike is high or low mileage for its age.
| YearYear | MedianMedian mileage | Mi/yrMiles/year | MOT passFirst-time pass | |
|---|---|---|---|---|
| 2026 | 1,093 | — | — | — |
| 2025 | 773 | — | — | — |
| 2024 | 612 | 5,406 mi | — | 100% |
| 2023 | 718 | 4,079 mi | 1,546 | 89.37% |
| 2022 | 912 | 5,307 mi | 1,124 | 89.93% |
| 2021 | 1,316 | 6,280 mi | 993 | 92.01% |
| 2020 | 15 | 5,756 mi | 805 | 95.65% |
| 2019 | 15 | 16,086 mi | 21 | 96.15% |
| 2018 | 16 | 9,466 mi | 157 | 88.89% |
| 2017 | 35 | 10,064 mi | 308 | 95.56% |
| 2016 | 30 | 9,168 mi | 296 | 87.04% |
| 2015 | 29 | 12,641 mi | 370 | 90.14% |
| 2014 | 13 | 10,981 mi | 226 | 95.56% |
| 2013 | 13 | 13,153 mi | 192 | 91.67% |
| 2012 | 12 | 11,186 mi | 28 | 75% |
| 2011 | 5 | 18,088 mi | 294 | 94.12% |
| 2010 | 6 | 14,386 mi | 25 | 68.42% |
| 2009 | 12 | 10,674 mi | 184 | 92.86% |
| 2008 | 9 | 12,994 mi | 197 | 85% |
| 2007 | 6 | 6,514 mi | 341 | 81.82% |
Trident 660 questions, answered with data
What are the most common problems with the Triumph Trident 660?
Across 9,010 UK examples, the most frequently recorded MOT faults are brake discs and pads (13.9% of all recorded faults), wheels (10.1% of all recorded faults), exhaust and emissions (9% of all recorded faults).
What is average mileage for a Triumph Trident 660?
The median Triumph Trident 660 in the UK has covered 11,862 miles, and typically rides about 653 miles a year. Half of all examples fall between 5,164 and 28,390 miles.
Is the Triumph Trident 660 reliable?
85.94% of Triumph Trident 660 MOT tests are passed first time, with an average of 0.02 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 9,010 Triumph Trident 660 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.