YAMAHA YQ100

98cc Petrol Class 1

#5029 of 5426 overall #393 of 409 YAMAHAs #526 of 734 commuter bikes

64.7%

first-time pass rate

27.2%

failed outright

9,888

median miles at test

7,747

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2025

The YQ100's first-time pass rate has risen 12.3 points since 2005, 69.3% to 81.6%.

Pass rate by mileage

how the YQ100's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage YQ100 passes first time 70.7% of the time; by 40k that's 71.4%.

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 YQ100

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	2,580	41	4.6×
brakes	1,287	20.5	2.8×
steering and suspension	1,177	18.7	3.2×
tyres and wheels	392	6.2	2.3×
fuel and exhaust	383	6.1	5.7×
body and structure	135	2.1	3.1×
lamps and reflectors	126	2	0.5×
reg plates and vin	104	1.7	2.0×
Items Not Tested	72	1.1	8.3×
suspension	37	0.6	0.5×

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 YQ100 beats 0 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 YQ100.

Pass rate by registration year

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

Best year to buy used: 2000 (66.3% pass). Weakest: 2001 (63.7%).

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.

YAMAHA YQ100 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA YQ100 reliable?

The YAMAHA YQ100 is less reliable than average for its class: 64.7% of its 7,747 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5029 of 5426 models.

What does a YQ100 fail its MOT on most?

lighting and signalling — 41% of all defects recorded against failed YQ100 tests.

What is the best year of YQ100 to buy used?

By first-time pass rate, 2000-registered examples do best (66.3%) and 2002 worst (63.7%). Condition and history still trump the year.

How many miles will a YQ100 last?

The median YQ100 shows 9,888 miles at test, and examples around 40k miles still pass 71.4% of the time — mileage alone rarely kills one.