YAMAHA RSX100

98cc Petrol Class 1

#4638 of 5426 overall #354 of 409 YAMAHAs #331 of 734 commuter bikes

71.2%

first-time pass rate

18.8%

failed outright

18,572

median miles at test

319

MOT tests, 2005–2025

Pass rate by mileage

how the RSX100's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage RSX100 passes first time 81.0% of the time; by 30k that's 60.0%.

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 RSX100

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	115	47.9
steering and suspension	36	15
tyres and wheels	20	8.3
drive system	19	7.9
brakes	19	7.9
body and structure	8	3.3
reg plates and vin	8	3.3
lamps and reflectors	6	2.5
fuel and exhaust	6	2.5
driving controls	3	1.2

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 RSX100 beats 1 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 RSX100.

Pass rate by registration year

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

Best year to buy used: 1990 (66.7% pass). Weakest: 1990 (66.7%).

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.