SWM RS vs Yamaha YP250

The SWM RS passes its MOT first time more often than the Yamaha YP250 — 84.6% vs 82.5%, a 2.1-point lead.

MOT reliability, side by side

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

Metric	SWM RS	Yamaha YP250
First-time pass rate	84.6%	82.5%
Outright fail rate	7.5%	12.3%
Median miles at test	2,858	15,613
MOT tests analysed	228	12,433
Most common failure	suspension	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.

SWM RS 84.6% pass · 228 tests YAMAHA YP250 82.5% pass · 12.4k tests

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