SYM Jet 4
Real ownership data from 4,265 UK Jet 4 motorcycles — mileage, MOT pass rates and the faults that actually come up, taken from DVSA test records rather than opinion.
Most common Jet 4 problems
Ranked by how often each fault appears in this model's MOT history.
| Fault | Severity | Share of faults |
|---|---|---|
| Steering and head bearings | fail | 24.1% |
| Other | dangerous | 9.4% |
| Electrical | fail | 8.2% |
| Brakes | major | 6.4% |
| Tyres | user entered | 4.9% |
| Lights and indicators | major | 4.7% |
| Controls and cables | dangerous | 4.3% |
| Wheels | major | 3.7% |
Advisories (wear noted but not failed) are excluded above; the most common is frame and structure.
Jet 4 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 | 192 | — | — | — |
| 2025 | 197 | — | — | — |
| 2024 | 226 | — | — | — |
| 2023 | 196 | 4,873 mi | 2,030 | 75.76% |
| 2022 | 124 | 4,993 mi | 2,066 | 67.83% |
| 2021 | 138 | 9,546 mi | 2,022 | 77.3% |
| 2020 | 267 | 9,909 mi | 1,934 | 75.63% |
| 2019 | 275 | 9,609 mi | 1,491 | 70.96% |
| 2018 | 329 | 9,307 mi | 1,759 | 74.92% |
| 2017 | 177 | 9,666 mi | 1,987 | 73.31% |
| 2016 | 144 | 12,080 mi | 1,499 | 62.5% |
| 2015 | 138 | 17,257 mi | 1,833 | 56.25% |
| 2014 | 195 | 7,600 mi | 1,412 | 67.35% |
| 2013 | 512 | 11,963 mi | 1,516 | 72.3% |
| 2012 | 603 | 10,436 mi | 1,624 | 73.42% |
| 2011 | 435 | 11,886 mi | 2,072 | 73.09% |
| 2010 | 117 | 14,248 mi | 1,918 | 74.06% |
Jet 4 questions, answered with data
What are the most common problems with the SYM Jet 4?
Across 4,265 UK examples, the most frequently recorded MOT faults are steering and head bearings (24.1% of all recorded faults), other (9.4% of all recorded faults), electrical (8.2% of all recorded faults).
What is average mileage for a SYM Jet 4?
The median SYM Jet 4 in the UK has covered 10,330 miles, and typically rides about 1,826 miles a year. Half of all examples fall between 5,992 and 15,802 miles.
Is the SYM Jet 4 reliable?
73.16% of SYM Jet 4 MOT tests are passed first time, with an average of 0.06 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 4,265 SYM Jet 4 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.