SYM Jet X 125
Real ownership data from 1,438 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 | 13.9% |
| Steering and head bearings | dangerous | 8.3% |
| Tyres | dangerous | 7% |
| Brake discs and pads | dangerous | 5.6% |
| Brakes | dangerous | 5.6% |
| Electrical | major | 4.2% |
| Suspension | dangerous | 4.2% |
| Wheels | dangerous | 4.2% |
Advisories (wear noted but not failed) are excluded above; the most common is brakes.
Jet X 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 | 95 | — | — | — |
| 2025 | 98 | — | — | — |
| 2024 | 380 | 2,936 mi | — | 50% |
| 2023 | 360 | 5,750 mi | 2,621 | 74.17% |
| 2022 | 382 | 8,804 mi | 2,317 | 76.12% |
| 2021 | 123 | 11,382 mi | 1,818 | 73.3% |
Jet X 125 questions, answered with data
What are the most common problems with the SYM Jet X 125?
Across 1,438 UK examples, the most frequently recorded MOT faults are lights and indicators (13.9% of all recorded faults), steering and head bearings (8.3% of all recorded faults), tyres (7% 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 8,241 miles, and typically rides about 2,249 miles a year. Half of all examples fall between 4,095 and 13,234 miles.
Is the SYM Jet X 125 reliable?
74.92% of SYM Jet X 125 MOT tests are passed first time, with an average of 0.09 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 1,438 SYM Jet X 125 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.