Ajs JSM 125 vs Honda CG125

The Honda CG125 passes its MOT first time more often than the Ajs JSM 125: 72.2% vs 54.9%, a 17.3-point lead.

MOT reliability, side by side

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

Metric	Ajs JSM 125	Honda CG125
First-time pass rate	54.9%	72.2%
Outright fail rate	35.4%	16.8%
Vs comparable bikes (age & mileage adjusted)	-18.0 pts	+0.7 pts
Engine size	124cc	124cc
Median miles at test	9,376	17,460
MOT tests analysed	164	89,345
Most common failure	lighting and signalling	lighting and signalling

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 mileage

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

Mileage	Ajs JSM 125	Honda CG125
0k-10k miles	58.9%	79.3%
10k-20k miles	42.9%	73.0%

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

AJS JSM 125 54.9% pass · 164 tests HONDA CG125 72.2% pass · 89.3k tests

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