BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025

HONDA NB50MF

49cc Petrol Class 1
79.9%
first-time pass rate
14.1%
failed outright
5,552
median miles at test
234
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2008

The NB50MF's first-time pass rate has fallen 1.7 points since 2006, 78.4% to 76.7%.

76%78%79%2006: 78.4% pass (37 tests)2008: 76.7% pass (30 tests)20062008

What fails on a NB50MF

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
25 32.5
steering and suspension
19 24.7
brakes
13 16.9
tyres and wheels
9 11.7
body and structure
5 6.5
fuel and exhaust
3 3.9
suspension
2 2.6
reg plates and vin
1 1.3

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the NB50MF beats 4 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the NB50MF.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 1986 (82.0% pass). Weakest: 1985 (76.7%).

76%79%83%1985: 76.7% pass (90 tests)1986: 82.0% pass (111 tests)19851986

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.