TRIUMPH T120 BONNEVILLE

650cc Petrol Class 2

#153 of 5426 overall #7 of 175 TRIUMPHs #24 of 465 cruiser bikes

94.1%

first-time pass rate

2.5%

failed outright

10,910

median miles at test

320

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2013–2017

The T120 BONNEVILLE's first-time pass rate has risen 3.4 points since 2013, 93.3% to 96.7%.

Pass rate by mileage

how the T120 BONNEVILLE's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage T120 BONNEVILLE passes first time 93.7% of the time; by 20k that's 100.0%.

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 T120 BONNEVILLE

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	8	57.1
brakes	3	21.4
steering and suspension	2	14.3
tyres and wheels	1	7.1

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 T120 BONNEVILLE beats 1 of its 1 closest rivals (HONDA SHADOW).

HONDA SHADOW 81.0% pass · 6,066 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 T120 BONNEVILLE.

Pass rate by registration year

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

Best year to buy used: 1970 (93.1% pass). Weakest: 1970 (93.1%).

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.