SYM Jet X 125
Real ownership data from 1,419 UK Jet X 125 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common Jet X 125 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Lights and indicators | dangerous | 22% |
| Brake discs and pads | dangerous | 16.3% |
| Tyres | dangerous | 12.2% |
| Steering and head bearings | dangerous | 9.8% |
| Brakes | dangerous | 4.9% |
| Electrical | major | 2.4% |
| Suspension | dangerous | 2.4% |
| Wheels | dangerous | 2.4% |
Advisories (wear noted but not failed) are excluded above; the most common is corrosion.
Jet X 125 mileage and reliability by year
Use this to judge whether a specific bike is high or low mileage for its age.
| Year | Examples | Median mileage | Miles/year | First-time pass |
|---|---|---|---|---|
| 2026 | 75 | — | — | — |
| 2025 | 98 | — | — | — |
| 2024 | 380 | 2,936 mi | — | 50% |
| 2023 | 360 | 5,774 mi | 2,621 | 72.63% |
| 2022 | 380 | 8,304 mi | 2,317 | 76.01% |
| 2021 | 123 | 11,536 mi | 2,116 | 73.13% |
Jet X 125 questions, answered with data
What are the most common problems with the SYM Jet X 125?
Across 1,419 UK examples, the most frequently recorded MOT faults are lights and indicators (22% of all recorded faults), brake discs and pads (16.3% of all recorded faults), tyres (12.2% of all recorded faults).
What is average mileage for a SYM Jet X 125?
The median SYM Jet X 125 in the UK has covered 8,062 miles, and typically rides about 2,310 miles a year. Half of all examples fall between 4,101 and 13,150 miles.
Is the SYM Jet X 125 reliable?
74.74% of SYM Jet X 125 MOT tests are passed first time, with an average of 0.17 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 1,419 SYM Jet X 125 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.