Yamaha YZ 125
Real ownership data from 441 UK YZ 125 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common YZ 125 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Lights and indicators | major | 11.2% |
| Tyres | major | 10.4% |
| Brakes | dangerous | 10% |
| Suspension | dangerous | 9.8% |
| Electrical | major | 7.7% |
| Other | major | 7.3% |
| Brake discs and pads | dangerous | 5.1% |
| Steering and head bearings | dangerous | 4.1% |
Advisories (wear noted but not failed) are excluded above; the most common is tyres.
YZ 125 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 | 12 | — | — | — |
| 2025 | 29 | — | — | — |
| 2024 | 21 | — | — | — |
| 2023 | 31 | — | — | 50% |
| 2022 | 16 | — | — | 90% |
| 2021 | 14 | — | — | 71.43% |
| 2020 | 9 | — | — | 100% |
| 2019 | 6 | — | — | 100% |
| 2018 | 9 | — | — | 100% |
| 2016 | 8 | 252 mi | 69 | 78.26% |
| 2015 | 10 | 80 mi | 6 | 75.76% |
| 2011 | 10 | 5,534 mi | — | 67.57% |
| 2010 | 5 | 1,433 mi | 1,909 | 77.27% |
| 2009 | 8 | 1,826 mi | — | 65.71% |
| 2008 | 8 | 2 mi | 2,036 | 65.63% |
| 2007 | 9 | 1,073 mi | — | 85% |
| 2006 | 22 | 148 mi | 83 | 79.17% |
| 2005 | 23 | 873 mi | — | 78.72% |
| 2004 | 11 | 7,660 mi | — | 82.76% |
| 2003 | 14 | 150 mi | — | 85.42% |
YZ 125 questions, answered with data
What are the most common problems with the Yamaha YZ 125?
Across 441 UK examples, the most frequently recorded MOT faults are lights and indicators (11.2% of all recorded faults), tyres (10.4% of all recorded faults), brakes (10% of all recorded faults).
What is average mileage for a Yamaha YZ 125?
The median Yamaha YZ 125 in the UK has covered 808 miles, and typically rides about 198 miles a year. Half of all examples fall between 99 and 1,427 miles.
Is the Yamaha YZ 125 reliable?
76.07% of Yamaha YZ 125 MOT tests are passed first time, with an average of 0.61 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 441 Yamaha YZ 125 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.