Triumph TT600 MOT pass rate and common failures

Triumph TT600 motorcycles pass the MOT 79.34% of the time, measured across 305 tests in the DVSA record. A further 5.9% passed only after a defect was put right at the test station.

Worse than average: 7.5 points below the 86.87% figure for all motorcycles tested.

Pass rate 79.34% 242 of 305

Fixed at the station 5.9% passed after an on-the-spot repair

Average mileage at test 22,444 miles

Average age at test 23.85 years old

Engine 597cc MOT class 2

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What to check before the MOT

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

Start with not working - it accounts for 60% of failed tests on this model.
Then check has a serious fluid leak and contaminated, the next two most common reasons.
The most common advisory is has a serious fluid leak (9.2% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 22,444 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
16+ years	79.34%		305

Why the Triumph TT600 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	Not working	60%	27
2	Has a serious fluid leak	24.4%	11
3	Contaminated	22.2%	10
4	Insecure	15.6%	7
5	Too low	13.3%	6
6	Does not illuminate by the operation of both brake controls	11.1%	5
7	Excessively stiff or notchy	11.1%	5
8	Projected beam image obviously incorrect	11.1%	5
9	Has insufficient reserve travel	8.9%	4
10	Less than 1.0 mm thick	8.9%	4

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	Has a serious fluid leak	9.2%	28
2	Tread depth is below minimum requirements of 1.0mm	8.5%	26
3	Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition	6.6%	20
4	Indicates excessive fluctuation of brake effort	4.3%	13
5	Significantly and obviously worn	4.3%	13
6	In such a condition that it is seriously weakened	3.6%	11
7	Less than 1.0 mm thick	3.6%	11
8	Excessively loose	3.3%	10
9	Excessively stiff or notchy	3.3%	10
10	Has excessive play	1.6%	5

Triumph TT600 for sale

No Triumph TT600 in stock at the moment - 107 other Triumph bikes are advertised.

Used Triumph TT600 Used Triumph All Triumph Triumph MOT statistics

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 TT600 MOT questions

What is the MOT pass rate for the Triumph TT600?+

79.34% of Triumph TT600 MOT tests end in a pass, based on 305 tests in the DVSA dataset.

What is the most common MOT failure on a Triumph TT600?+

Not working, which appears in 60% 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.