TRIUMPH TRW

500cc Petrol Class 2

#343 of 5426 overall #17 of 175 TRIUMPHs #211 of 2787 other bikes

92.7%

first-time pass rate

1.4%

failed outright

11,380

median miles at test

508

MOT tests, 2005–2025

Pass rate over time

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

The TRW's first-time pass rate has fallen 4.0 points since 2006, 94.3% to 90.3%.

Pass rate by mileage

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

A low-mileage TRW passes first time 91.6% of the time; by 30k that's 91.9%.

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 TRW

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	6	50	0.2×
brakes	2	16.7	0.1×
body and structure	1	8.3	0.4×
driving controls	1	8.3	0.8×
steering and suspension	1	8.3	0.1×
tyres and wheels	1	8.3	0.1×

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 TRW 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 TRW.

Pass rate by registration year

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

Best year to buy used: 1964 (95.4% pass). Weakest: 1964 (95.4%).

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 TRW FAQ

answers computed from the data above · terms in the glossary

Is the TRIUMPH TRW reliable?

The TRIUMPH TRW is more reliable than average for its class: 92.7% of its 508 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #343 of 5426 models.

What does a TRW fail its MOT on most?

lighting and signalling — 50% of all defects recorded against failed TRW tests.

How many miles will a TRW last?

The median TRW shows 11,380 miles at test, and examples around 30k miles still pass 91.9% of the time — mileage alone rarely kills one.