SYM Jet 4 125 vs Honda PCX 125

The Honda PCX 125 passes its MOT first time more often than the SYM Jet 4 125: 81.1% vs 74.9%, a 6.2-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	SYM Jet 4 125	Honda PCX 125
First-time pass rate	74.9%	81.1%
Outright fail rate	19.2%	12.9%
Vs comparable bikes (age & mileage adjusted)	+5.0 pts	+8.2 pts
Engine size	124cc	125cc
Rank among all models	#4314 of 5428	#3358 of 5428
Median miles at test	13,464	16,405
MOT tests analysed	395	88,608
Most common failure	brakes	brakes

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	SYM Jet 4 125	Honda PCX 125
2013	66.7%	85.2%
2014	73.6%	84.4%
2015	77.6%	83.5%
2016	81.5%	82.5%
2017	69.2%	80.5%
2019	76.7%	79.9%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	SYM Jet 4 125	Honda PCX 125
0k-10k miles	82.1%	88.4%
10k-20k miles	73.0%	79.3%
20k-30k miles	75.0%	78.0%

Bands with fewer than 30 tests for either bike are left out.

SYM JET 4 125 74.9% pass · 395 tests HONDA PCX 125 81.1% pass · 88.6k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.