YAMAHA T80

79cc Petrol Class 1

#4171 of 5426 overall #307 of 409 YAMAHAs #203 of 734 commuter bikes

76.1%

first-time pass rate

16.7%

failed outright

17,004

median miles at test

3,798

MOT tests, 2005–2025

Pass rate over time

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

The T80's first-time pass rate has risen 20.6 points since 2005, 73.1% to 93.7%.

Pass rate by mileage

how the T80's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage T80 passes first time 80.3% of the time; by 50k that's 67.1%.

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 T80

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	824	45.2	2.5×
steering and suspension	297	16.3	1.9×
brakes	219	12	1.0×
tyres and wheels	186	10.2	2.1×
body and structure	80	4.4	3.7×
fuel and exhaust	77	4.2	2.4×
lamps and reflectors	73	4	0.8×
wheels	25	1.4	4.8×
suspension	22	1.2	0.6×
reg plates and vin	19	1	0.8×

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 T80 beats 3 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 T80.

Pass rate by registration year

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

Best year to buy used: 1983 (88.9% pass). Weakest: 1997 (70.0%).

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 T80 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA T80 reliable?

The YAMAHA T80 is more reliable than average for its class: 76.1% of its 3,798 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4171 of 5426 models.

What does a T80 fail its MOT on most?

lighting and signalling — 45% of all defects recorded against failed T80 tests.

What is the best year of T80 to buy used?

By first-time pass rate, 1983-registered examples do best (88.9%) and 1997 worst (70.0%). Condition and history still trump the year.

How many miles will a T80 last?

The median T80 shows 17,004 miles at test, and examples around 50k miles still pass 67.1% of the time — mileage alone rarely kills one.