Triumph Rocket 3 GT Triple Black (2021)
2021 Triumph Rocket 3 GT Triple Black
CarHunch analysed 145 real MOT records for the 2021 Triumph Rocket 3 GT Triple Black. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2021 Triumph Rocket 3 GT Triple Black is genuinely reliable, with an 86.9% first-time pass rate that sits comfortably above the UK average of 80%, and only 1.4% of vehicles have ever suffered a dangerous defect—well below what would concern a buyer. This is a motorcycle that's been treated well: the median mileage of 6,032 sits low for a three-year-old machine, averaging just 0.13 failures and 0.3 advisories per vehicle, which points to solid build quality and reasonable ownership practices.
The low failure count means most issues caught in MOT are minor wear items rather than structural problems. If you're considering one, verify the service history to confirm it's had the fuel system and cooling work that these air-cooled triple engines need in hot weather—it'll help you avoid the small percentage of advisories that do crop up.
What to check before buying a 2021 Triumph Rocket 3 GT Triple Black
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Triumph Rocket 3 GT Triple Black
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (99%) | 144 | 86.8% | 0.13 |
| Other (1%) | 1 | 100% | 0 |
Mileage Distribution
Most 2021 Triumph Rocket 3 GT Triple Black vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2021 Triumph Rocket 3 GT Triple Black vehicles fall between 3,079 and 9,029 miles.
MOT History Averages
Found a specific Triumph Rocket 3 GT Triple Black?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.