Triumph 900 street scrambler vs Triumph Unknown: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Triumph 900 street scrambler
75%
MOT pass rate · 1 vehicles
Triumph Unknown
89%
MOT pass rate · 65,927 vehicles
Verdict: On MOT pass rate the Triumph 900 street scrambler (75%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Triumph 900 street scrambler | Triumph Unknown |
|---|---|---|
| MOT pass rate | 75% | 89% ✓ |
| MOT failure rate | 25% | 11% ✓ |
| Faults & advisories per test | 0.8 | 0.6 ✓ |
| Dangerous-fault share | 0% ✓ | 2% |
| Average mileage | 4,573 mi | 16,601 mi |
| Sample size (vehicles) | 1 | 65,927 |
Most common faults
Triumph 900 street scrambler
- Central Front Headlamp aim too low (4.1.2 (a))
- Central Rear Registration plate lamp missing in the case of a single lamp or all lamps (4.7.1 (b) (ii))
- Drive chain slightly loose (6.1.7 (c) (i))
Triumph Unknown
- Exhaust noisy (8.1.1 (a))
- Exhaust noisy (7.1.2)
- Front Roller brake test indicates slight fluctuation of brake effort (3.3.A1d)
- COVID-19 6 MONTH EXTENSION
- Rear Tyre worn close to the legal limit (5.2.3 (e))
- Steering headbearing has slight free play (2.2.2)
Reliability FAQ
On MOT pass rate the Triumph 900 street scrambler (75%) and Triumph Unknown (89%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Triumph 900 street scrambler report Full Triumph Unknown report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.