Yamaha DT 100
Real ownership data from 141 UK DT 100 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common DT 100 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Lights and indicators | major | 21.9% |
| Brakes | fail | 6.1% |
| Tyres | fail | 3.2% |
| Controls and cables | fail | 3.2% |
| Suspension | major | 2.8% |
| Other | fail | 2.4% |
| Wheels | major | 2.4% |
| Electrical | fail | 2% |
Advisories (wear noted but not failed) are excluded above; the most common is suspension.
DT 100 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 | |
|---|---|---|---|---|
| 1983 | 9 | 7,030 mi | 74 | 61.11% |
| 1982 | 6 | 9,282 mi | 92 | 81.25% |
| 1981 | 8 | 7,625 mi | 298 | 84.62% |
| 1980 | 15 | 11,377 mi | 71 | 91.67% |
| 1979 | 13 | 12,332 mi | 84 | 90.91% |
| 1978 | 9 | 14,012 mi | — | 87.5% |
| 1977 | 15 | 7,204 mi | 12 | 77.27% |
| 1976 | 8 | 7,587 mi | 30 | 77.78% |
| 1975 | 9 | — | — | — |
| 1974 | 8 | 1,945 mi | — | 66.67% |
DT 100 questions, answered with data
What are the most common problems with the Yamaha DT 100?
Across 141 UK examples, the most frequently recorded MOT faults are lights and indicators (21.9% of all recorded faults), brakes (6.1% of all recorded faults), tyres (3.2% of all recorded faults).
What is average mileage for a Yamaha DT 100?
The median Yamaha DT 100 in the UK has covered 7,334 miles, and typically rides about 83 miles a year. Half of all examples fall between 3,292 and 12,369 miles.
Is the Yamaha DT 100 reliable?
82.61% of Yamaha DT 100 MOT tests are passed first time, with an average of 0.95 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 141 Yamaha DT 100 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.