BIKERELIABILITY Reg check
Model report · 2005–2025

GENERIC TR

124cc Petrol Class 1
52.7%
first-time pass rate
38.0%
failed outright
5,959
median miles at test
129
MOT tests, 2005–2025
-22.6pp
vs expected · age & mileage

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

What fails on a TR

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
brakes
36 20.8
lamps and reflectors
28 16.2
suspension
23 13.3
lighting and signalling
21 12.1
structure and attachments
20 11.6
drive system
13 7.5
steering and suspension
12 6.9
steering
11 6.4
Identification of the vehicle
7 4
audible warning (Horn)
2 1.2

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 TR beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

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 TR.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the TR

Pass rate by registration year

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

Best year to buy used: 2014 (52.1% pass). Weakest: 2014 (52.1%).

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.

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