Triumph TRIDENT 660cc MOT pass rate and common failures

Triumph TRIDENT 660cc motorcycles pass the MOT 91.13% of the time, measured across 1,893 tests in the DVSA record. A further 4.65% passed only after a defect was put right at the test station.

Calculated from DVSA records for Triumph TRIDENT, 660cc.

Better than average: 4.3 points above the 86.87% figure for all motorcycles tested.

Pass rate 91.13% 1,725 of 1,893

Fixed at the station 4.65% passed after an on-the-spot repair

Average mileage at test 6,162 miles

Average age at test 3.58 years old

Engine 660cc MOT class 1 and 2

For sale now 0 Triumph TRIDENT 660cc adverts

What to check before the MOT

Built from this model's own failure record, not general advice.

Start with missing - it accounts for 56.3% of failed tests on this model.
Then check too high and too low, the next two most common reasons.
The most common advisory is excessively loose (4.4% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 6,162 miles, which is the number to compare any advert against.

Pass rate by age

A single pass rate hides the most useful thing in this data: how the same model behaves at three years old and at fifteen.

Age at test	Pass rate		Tests
3-5 years	91.13%		1,893

Why the Triumph TRIDENT 660cc fails

Share of failed tests on this model where the item was recorded. One test can fail on several items, so the column does not add up to 100%.

#	Item	Of failures	Tests
1	Missing	56.3%	45
2	Too high	42.5%	34
3	Too low	33.8%	27
4	Excessively loose	17.5%	14
5	Excessively stiff or notchy	17.5%	14
6	Not working	16.3%	13
7	Less than 1.0 mm thick	12.5%	10
8	Does not conform to the specified requirements	7.5%	6
9	Excessively binding	7.5%	6
10	Does not illuminate by the operation of both brake controls	6.3%	5

Most common advisories

Not a failure and not a legal requirement to fix - but an advisory that repeats year after year is money the next owner spends.

#	Item	Of all tests	Tests
1	Excessively loose	4.4%	84
2	Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition	3.4%	64
3	Excessively stiff or notchy	2.9%	55
4	Tread depth is below minimum requirements of 1.0mm	2.9%	54
5	Less than 1.0 mm thick	1.7%	32
6	Worn to excess	1.4%	27
7	Indicates excessive fluctuation of brake effort	1.4%	26
8	Tread not clearly visible	0.6%	12
9	Excessively binding	0.6%	11
10	Has excessive play	0.4%	7

Triumph TRIDENT 660cc for sale

No Triumph TRIDENT 660cc in stock at the moment - 108 other Triumph bikes are advertised.

Used Triumph TRIDENT 660cc Used Triumph All Triumph Triumph MOT statistics Check a specific bike by plate

Similar bikes compared

Models of comparable capacity, so the comparison means something.

Model	Tests	Pass rate	Avg mileage
Honda CB 397-750cc · 397-750cc	5,400	89.76%	19,444
Honda NC · 741cc	5,311	89.53%	22,765
Suzuki GSF600 · 600cc	4,890	80%	29,308
Honda CBR600F · 599cc	4,710	85.56%	30,651
Kawasaki ZX-6R · 599-636cc	4,510	81.62%	26,019
Suzuki SV650 · 646cc	3,834	80.99%	27,644

Source: DVSA MOT testing data, 2025 · updated Aug 2026 · licence and method

Triumph TRIDENT 660cc MOT questions

What is the MOT pass rate for the Triumph TRIDENT 660cc?+

91.13% of Triumph TRIDENT 660cc MOT tests end in a pass, based on 1,893 tests in the DVSA dataset.

What is the most common MOT failure on a Triumph TRIDENT 660cc?+

Missing, which appears in 56.3% of failed tests on this model.

Where does this data come from?+

From the DVSA anonymised MOT testing dataset, which records every MOT carried out in England, Scotland and Wales. It is published under the Open Government Licence and covers 2025.

Does a high pass rate mean the bike is reliable?+

Not by itself. The MOT checks safety items - brakes, tyres, lights, structure - and says nothing about engines, gearboxes or electrics. Read it as a maintenance signal, not a reliability score.