BIKERELIABILITY Reg check
League table/ SYM/JET 50 BASIX
Model report · 2005–2025

SYM JET 50 BASIX

49cc Petrol Class 1
#4533 of 5428 overall #54 of 78 SYMs #180 of 456 moped bikes
72.6%
first-time pass rate
17.5%
failed outright
13,897
median miles at test
405
MOT tests, 2005–2025
+2.2pp
vs expected · age & mileage

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

Pass rate over time

first-time pass rate by test year · 2010–2017

The JET 50 BASIX's first-time pass rate has fallen 23.8 points since 2010, 83.8% to 60.0%.

53%71%90%2010: 83.8% pass (37 tests)2011: 79.2% pass (53 tests)2012: 78.0% pass (50 tests)2013: 73.9% pass (46 tests)2014: 68.1% pass (47 tests)2015: 73.3% pass (45 tests)2016: 58.8% pass (34 tests)2017: 60.0% pass (30 tests)20102017

Pass rate by mileage

how the JET 50 BASIX's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage JET 50 BASIX passes first time 79.8% of the time; by 20k that's 59.5%.

55%70%84%0k: 79.8% pass (129 tests)10k: 72.5% pass (160 tests)20k: 59.5% pass (74 tests)0k10k20k

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a JET 50 BASIX

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
57 32.9
brakes
34 19.7
steering and suspension
23 13.3
lamps and reflectors
19 11
fuel and exhaust
16 9.2
tyres and wheels
11 6.4
structure and attachments
5 2.9
suspension
4 2.3
body and structure
2 1.2
audible warning (Horn)
2 1.2

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the JET 50 BASIX beats 4 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests Compare head-to-head →
PIAGGIO ZIP 71.3% pass · 79.0k tests Compare head-to-head →
PIAGGIO NRG 65.5% pass · 40.5k tests Compare head-to-head →
PEUGEOT VIVACITY 70.4% pass · 29.7k tests Compare head-to-head →

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the JET 50 BASIX.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the Jet 50 Basix

More SYM models

other SYM bikes ranked by MOT pass rate
SYM JET 73.4% pass · 23.2k tests
SYM DD50 73.3% pass · 5,940 tests
SYM CITY HOPPER 71.4% pass · 4,446 tests
SYM JET 50 - EURO X 72.3% pass · 4,412 tests
SYM FIDDLE 76.6% pass · 3,826 tests
SYM SHARK 77.1% pass · 3,624 tests

See all SYM models →

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2009 (75.7% pass). Weakest: 2008 (69.5%).

68%73%77%2007: 71.9% pass (121 tests)2008: 69.5% pass (95 tests)2009: 75.7% pass (74 tests)200720082009

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

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