YAMAHA RS100

96cc Petrol Class 1

#4347 of 5426 overall #327 of 409 YAMAHAs #245 of 734 commuter bikes

74.6%

first-time pass rate

14.8%

failed outright

15,921

median miles at test

568

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2015

The RS100's first-time pass rate has fallen 1.5 points since 2006, 70.3% to 68.8%.

Pass rate by mileage

how the RS100's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage RS100 passes first time 83.0% of the time; by 30k that's 71.2%.

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 RS100

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	147	55.9	2.5×
steering and suspension	35	13.3	1.6×
tyres and wheels	23	8.7	1.9×
brakes	19	7.2	0.7×
drive system	16	6.1	2.9×
lamps and reflectors	9	3.4	0.6×
audible warning (Horn)	4	1.5	3.8×
fuel and exhaust	4	1.5	0.7×
tyres	4	1.5	0.5×
body and structure	2	0.8	0.4×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the RS100 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 GILERA RUNNER 70.8% pass · 69.9k 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 RS100.

Pass rate by registration year

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

Best year to buy used: 1980 (74.0% pass). Weakest: 1980 (74.0%).

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.

YAMAHA RS100 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA RS100 reliable?

The YAMAHA RS100 is about average for its class: 74.6% of its 568 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4347 of 5426 models.

What does a RS100 fail its MOT on most?

lighting and signalling — 56% of all defects recorded against failed RS100 tests.

How many miles will a RS100 last?

The median RS100 shows 15,921 miles at test, and examples around 30k miles still pass 71.2% of the time — mileage alone rarely kills one.