TRIUMPH T100S

500cc Petrol Class 2

#489 of 5426 overall #31 of 175 TRIUMPHs #299 of 2787 other bikes

91.9%

first-time pass rate

3.0%

failed outright

7,893

median miles at test

594

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2017

The T100S's first-time pass rate has fallen 3.2 points since 2006, 96.1% to 92.9%.

Pass rate by mileage

how the T100S's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage T100S passes first time 91.8% of the time; by 40k that's 94.6%.

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 T100S

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	18	54.5	0.5×
steering and suspension	7	21.2	0.3×
brakes	3	9.1	0.1×
tyres and wheels	3	9.1	0.3×
drive system	2	6.1	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 T100S beats 4 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

KAWASAKI ZX-6R 78.1% pass · 174k tests SUZUKI GSF600 77.3% pass · 143k tests YAMAHA FZS600 82.6% pass · 137k tests SUZUKI SV650S 80.6% pass · 84.6k 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 T100S.

Pass rate by registration year

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

Best year to buy used: 1970 (93.7% pass). Weakest: 1969 (91.1%).

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.

TRIUMPH T100S FAQ

answers computed from the data above · terms in the glossary

Is the TRIUMPH T100S reliable?

The TRIUMPH T100S is more reliable than average for its class: 91.9% of its 594 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #489 of 5426 models.

What does a T100S fail its MOT on most?

lighting and signalling — 55% of all defects recorded against failed T100S tests.

What is the best year of T100S to buy used?

By first-time pass rate, 1970-registered examples do best (93.7%) and 1969 worst (91.1%). Condition and history still trump the year.

How many miles will a T100S last?

The median T100S shows 7,893 miles at test, and examples around 40k miles still pass 94.6% of the time — mileage alone rarely kills one.