Bsa B25SS vs Honda XR250

The Bsa B25SS passes its MOT first time more often than the Honda XR250: 88.3% vs 78.8%, a 9.5-point lead.

MOT reliability, side by side

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

Metric	Bsa B25SS	Honda XR250
First-time pass rate	88.3%	78.8%
Outright fail rate	5.7%	12.3%
Vs comparable bikes (age & mileage adjusted)	-1.9 pts	-6.8 pts
Engine size	250cc	249cc
Rank among all models	#1505 of 5428	#3805 of 5428
Median miles at test	7,144	8,618
MOT tests analysed	247	9,277
Most common failure	steering and suspension	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	Bsa B25SS	Honda XR250
0k-10k miles	89.8%	79.5%
10k-20k miles	85.7%	78.9%

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

BSA B25SS 88.3% pass · 247 tests HONDA XR250 78.8% pass · 9,277 tests

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