Vespa (douglas) GS160 vs Yamaha Nmax 125

The Vespa (douglas) GS160 passes its MOT first time more often than the Yamaha Nmax 125: 90.3% vs 82.2%, a 8.1-point lead.

MOT reliability, side by side

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

Metric	Vespa (douglas) GS160	Yamaha Nmax 125
First-time pass rate	90.3%	82.2%
Outright fail rate	4.0%	11.4%
Engine size	160cc	125cc
Rank among all models	#854 of 5428	#3145 of 5428
Median miles at test	9,465	30,236
MOT tests analysed	372	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.

Pass rate by mileage

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

Mileage	Vespa (douglas) GS160	Yamaha Nmax 125
0k-10k miles	90.9%	90.9%
10k-20k miles	94.4%	84.2%
20k-30k miles	91.7%	81.9%
30k-40k miles	83.9%	79.2%
40k-50k miles	93.5%	79.8%

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

VESPA (DOUGLAS) GS160 90.3% pass · 372 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.