Triumph BONNEVILLE STREET TWIN MOT pass rate and common failures

Triumph BONNEVILLE STREET TWIN motorcycles pass the MOT 92.8% of the time, measured across 500 tests in the DVSA record. A further 5% passed only after a defect was put right at the test station.

Better than average: 5.9 points above the 86.87% figure for all motorcycles tested.

Pass rate 92.8% 464 of 500

Fixed at the station 5% passed after an on-the-spot repair

Average mileage at test 5,558 miles

Average age at test 3.47 years old

Engine 900cc MOT class 2

For sale now 0 Triumph BONNEVILLE STREET TWIN adverts

What to check before the MOT

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

Start with too high - it accounts for 72.7% of failed tests on this model.
Then check too low and not working, the next two most common reasons.
The most common advisory is tread depth is below minimum requirements of 1.0mm (5.4% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 5,558 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	92.87%		491

Why the Triumph BONNEVILLE STREET TWIN 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	Too high	72.7%	8
2	Too low	72.7%	8
3	Not working	36.4%	4
4	Excessively loose	27.3%	3
5	Less than 1.0 mm thick	27.3%	3
6	Does not conform to the specified requirements	18.2%	2
7	Missing	18.2%	2
8	Not working on dipped beam	18.2%	2
9	Obviously incorrectly positioned	18.2%	2
10	Tread depth is below minimum requirements of 1.0mm	18.2%	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	Tread depth is below minimum requirements of 1.0mm	5.4%	27
2	Less than 1.0 mm thick	4.2%	21
3	Excessively loose	1.6%	8
4	Indicates excessive fluctuation of brake effort	1.2%	6
5	Worn to excess	0.8%	4
6	Excessively stiff or notchy	0.6%	3
7	Is so short that the brake cannot be readily applied	0.6%	3
8	Tread not clearly visible	0.6%	3
9	Has excessive play	0.4%	2
10	Nail in tyre	0.4%	2

Triumph BONNEVILLE STREET TWIN for sale

No Triumph BONNEVILLE STREET TWIN in stock at the moment - 108 other Triumph bikes are advertised.

Used Triumph BONNEVILLE STREET TWIN 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
Triumph TIGER · 969cc	16,144	91.27%	22,934
Triumph BONNEVILLE 642-904cc · 642-904cc	12,456	90.8%	12,824
BMW R SERIES · 1,152cc	9,796	91.92%	40,594
BMW R1200 · 1,170cc	9,521	94.43%	28,830
BMW S 1000 · 999cc	8,445	91.96%	15,282
BMW R 1200 · 1,170cc	6,170	95.28%	27,241

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

Triumph BONNEVILLE STREET TWIN MOT questions

What is the MOT pass rate for the Triumph BONNEVILLE STREET TWIN?+

92.8% of Triumph BONNEVILLE STREET TWIN MOT tests end in a pass, based on 500 tests in the DVSA dataset.

What is the most common MOT failure on a Triumph BONNEVILLE STREET TWIN?+

Too high, which appears in 72.7% 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.