YAMAHA 100

97cc Petrol Class 1

78.1%

first-time pass rate

16.9%

failed outright

20,034

median miles at test

178

MOT tests, 2005–2025

Pass rate by mileage

how the 100's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage 100 passes first time 72.7% of the time; by 20k that's 84.6%.

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 100

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	44	44.4
tyres and wheels	16	16.2
steering and suspension	12	12.1
brakes	7	7.1
lamps and reflectors	5	5.1
body and structure	4	4
drive system	4	4
reg plates and vin	3	3
fuel and exhaust	2	2
tyres	2	2

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 100 beats 3 of its 4 closest rivals (YAMAHA YBR 125, HONDA C90, HONDA CG125).

YAMAHA YBR 125 71.0% pass · 125k tests HONDA C90 79.3% pass · 92.8k tests HONDA CG125 72.2% pass · 89.3k tests HONDA CBF125 73.3% pass · 84.4k 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 100.