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

YAMAHA RD50

49cc Petrol Class 1
83.0%
first-time pass rate
8.5%
failed outright
13,394
median miles at test
283
MOT tests, 2005–2025

Pass rate by mileage

how the RD50's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage RD50 passes first time 84.0% of the time; by 20k that's 75.0%.

73%81%90%0k: 84.0% pass (100 tests)10k: 87.1% pass (93 tests)20k: 75.0% pass (56 tests)0k10k20k

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a RD50

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
30 46.2
steering and suspension
10 15.4
brakes
6 9.2
tyres and wheels
6 9.2
lamps and reflectors
3 4.6
body and structure
3 4.6
fuel and exhaust
2 3.1
driving controls
2 3.1
drive system
2 3.1
steering
1 1.5

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 RD50 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 RD50.