YAMAHA RD80

79cc Petrol Class 1

85.4%

first-time pass rate

7.1%

failed outright

14,535

median miles at test

198

MOT tests, 2005–2025

Pass rate by mileage

how the RD80's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage RD80 passes first time 90.5% of the time; by 20k that's 86.4%.

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 RD80

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	13	25
brakes	9	17.3
lamps and reflectors	7	13.5
steering and suspension	5	9.6
steering	5	9.6
drive system	3	5.8
body and structure	3	5.8
tyres	3	5.8
audible warning (Horn)	2	3.8
suspension	2	3.8

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 RD80 beats 4 of its 4 closest rivals (HONDA C90, HONDA SCV100, YAMAHA YQ100).

HONDA C90 79.3% pass · 92.8k tests HONDA SCV100 70.7% pass · 31.3k tests YAMAHA YQ100 64.7% pass · 7,747 tests YAMAHA RXS100 68.0% pass · 6,955 tests

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 RD80.

Pass rate by registration year

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

Best year to buy used: 1982 (84.0% pass). Weakest: 1982 (84.0%).

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.