Triumph SPEED FOUR MOT pass rate and common failures

Triumph SPEED FOUR motorcycles pass the MOT 86.72% of the time, measured across 256 tests in the DVSA record. A further 4.69% passed only after a defect was put right at the test station.

About average - within 0.2 points of the 86.87% figure for all motorcycles tested.

Pass rate 86.72% 222 of 256

Fixed at the station 4.69% passed after an on-the-spot repair

Average mileage at test 23,831 miles

Average age at test 20.38 years old

Engine 599cc MOT class 2

For sale now 0 Triumph SPEED FOUR adverts

What to check before the MOT

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

Start with not working - it accounts for 63.6% of failed tests on this model.
Then check insecure and missing, the next two most common reasons.
The most common advisory is noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition (8.6% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 23,831 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	86.72%		256

Why the Triumph SPEED FOUR 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	63.6%	14
2	Insecure	22.7%	5
3	Missing	22.7%	5
4	Does not illuminate by the operation of both brake controls	18.2%	4
5	Has insufficient reserve travel	13.6%	3
6	Missing in the case of a single lamp or all lamps	13.6%	3
7	Too low	13.6%	3
8	Control functioning such that safe operation of the motorcycle is adversely affected	9.1%	2
9	Has excessive play	9.1%	2
10	Indicates excessive fluctuation of brake effort	9.1%	2

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	Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition	8.6%	22
2	Tread depth is below minimum requirements of 1.0mm	7.4%	19
3	Has a serious fluid leak	5.9%	15
4	Excessively loose	4.7%	12
5	Significantly and obviously worn	3.9%	10
6	Indicates excessive fluctuation of brake effort	3.5%	9
7	Less than 1.0 mm thick	3.1%	8
8	In such a condition that it is seriously weakened	2%	5
9	Worn to excess	1.6%	4
10	Chain guard missing	0.8%	2

Triumph SPEED FOUR for sale

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

Used Triumph SPEED FOUR 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 SPEED FOUR MOT questions

What is the MOT pass rate for the Triumph SPEED FOUR?+

86.72% of Triumph SPEED FOUR MOT tests end in a pass, based on 256 tests in the DVSA dataset.

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

Not working, which appears in 63.6% 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.