Kymco CK 125 vs Yamaha Nmax 125

The Yamaha Nmax 125 passes its MOT first time more often than the Kymco CK 125: 82.2% vs 60.4%, a 21.8-point lead.

MOT reliability, side by side

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

Metric	Kymco CK 125	Yamaha Nmax 125
First-time pass rate	60.4%	82.2%
Outright fail rate	25.2%	11.4%
Vs comparable bikes (age & mileage adjusted)	-10.9 pts	+9.5 pts
Engine size	124cc	125cc
Rank among all models	#5201 of 5428	#3145 of 5428
Median miles at test	13,397	30,236
MOT tests analysed	333	33,779
Most common failure	lighting and signalling	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 mileage

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

Mileage	Kymco CK 125	Yamaha Nmax 125
0k-10k miles	71.4%	90.9%
10k-20k miles	55.7%	84.2%
20k-30k miles	50.8%	81.9%

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

KYMCO CK 125 60.4% pass · 333 tests YAMAHA NMAX 125 82.2% pass · 33.8k tests

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