SYM Jet 4
Real ownership data from 4,212 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 |
|---|---|---|
| Lights and indicators | dangerous | 10% |
| Brakes | dangerous | 9.1% |
| Tyres | dangerous | 4.5% |
| Suspension | major | 3.2% |
| Brake discs and pads | dangerous | 2.4% |
| Exhaust and emissions | major | 1.8% |
| Steering and head bearings | major | 1.7% |
| Other | dangerous | 1.1% |
Advisories (wear noted but not failed) are excluded above; the most common is brakes.
Jet 4 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 | 134 | — | — | — |
| 2025 | 197 | — | — | — |
| 2024 | 226 | — | — | — |
| 2023 | 196 | 4,396 mi | 3,970 | 77.78% |
| 2022 | 124 | 4,402 mi | 2,180 | 69.07% |
| 2021 | 138 | 9,546 mi | 2,022 | 76.64% |
| 2020 | 267 | 9,902 mi | 1,946 | 76.05% |
| 2019 | 275 | 9,854 mi | 1,504 | 71.11% |
| 2018 | 330 | 9,307 mi | 1,759 | 74.91% |
| 2017 | 178 | 9,620 mi | 1,702 | 73.35% |
| 2016 | 147 | 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 | 11,930 mi | 1,516 | 72.37% |
| 2012 | 603 | 10,436 mi | 1,624 | 73.46% |
| 2011 | 435 | 11,832 mi | 2,072 | 73.11% |
| 2010 | 117 | 14,248 mi | 1,912 | 74.45% |
Jet 4 questions, answered with data
What are the most common problems with the SYM Jet 4?
Across 4,212 UK examples, the most frequently recorded MOT faults are lights and indicators (10% of all recorded faults), brakes (9.1% of all recorded faults), tyres (4.5% of all recorded faults).
What is average mileage for a SYM Jet 4?
The median SYM Jet 4 in the UK has covered 10,340 miles, and typically rides about 1,827 miles a year. Half of all examples fall between 6,028 and 15,790 miles.
Is the SYM Jet 4 reliable?
73.25% of SYM Jet 4 MOT tests are passed first time, with an average of 1.31 faults recorded per test. This is measured from DVSA MOT records, not owner opinion.
Based on DVSA MOT test records for 4,212 SYM Jet 4 motorcycles registered in Great Britain and Northern Ireland. Contains public sector information licensed under the Open Government Licence v3.0.