Yamaha YB 100
Real ownership data from 637 UK YB 100 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common YB 100 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Tyres | dangerous | 17.9% |
| Electrical | major | 16.4% |
| Other | major | 15% |
| Chain and sprockets | fail | 9.5% |
| Wheels | fail | 7% |
| Exhaust and emissions | fail | 6% |
| Controls and cables | major | 5.3% |
| Lights and indicators | minor | 3.9% |
Advisories (wear noted but not failed) are excluded above; the most common is controls and cables.
YB 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 | |
|---|---|---|---|---|
| 1994 | 8 | 12,538 mi | 139 | 80.52% |
| 1993 | 18 | 13,466 mi | 510 | 65.06% |
| 1992 | 28 | 14,688 mi | 238 | 75.69% |
| 1991 | 56 | 14,038 mi | 174 | 75.31% |
| 1990 | 93 | 18,053 mi | 236 | 77.04% |
| 1989 | 78 | 17,522 mi | 260 | 72.19% |
| 1988 | 57 | 21,237 mi | 535 | 68.47% |
| 1987 | 42 | 18,499 mi | 307 | 69.23% |
| 1986 | 22 | 22,303 mi | 400 | 68.81% |
| 1985 | 28 | 24,795 mi | 285 | 76.74% |
| 1984 | 27 | 15,230 mi | 83 | 78.38% |
| 1983 | 28 | 19,116 mi | 377 | 74.59% |
| 1982 | 33 | 12,884 mi | 222 | 70.99% |
| 1981 | 20 | 12,506 mi | 139 | 76.92% |
| 1980 | 24 | 17,625 mi | 136 | 77.66% |
| 1979 | 8 | 9,566 mi | 74 | 85.19% |
| 1977 | 7 | 7,375 mi | 48 | 100% |
| 1976 | 13 | 9,293 mi | 380 | 88.33% |
| 1975 | 11 | 15,372 mi | 155 | 84.44% |
| 1974 | 9 | 17,706 mi | 620 | 86.36% |
YB 100 questions, answered with data
What are the most common problems with the Yamaha YB 100?
Across 637 UK examples, the most frequently recorded MOT faults are tyres (17.9% of all recorded faults), electrical (16.4% of all recorded faults), other (15% of all recorded faults).
What is average mileage for a Yamaha YB 100?
The median Yamaha YB 100 in the UK has covered 17,077 miles, and typically rides about 237 miles a year. Half of all examples fall between 10,952 and 24,968 miles.
Is the Yamaha YB 100 reliable?
74.91% of Yamaha YB 100 MOT tests are passed first time, with an average of 0.29 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 637 Yamaha YB 100 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.