Triumph BONNEVILLE T 100 (865) MOT pass rate and common failures

Triumph BONNEVILLE T 100 (865) motorcycles pass the MOT 90.14% of the time, measured across 974 tests in the DVSA record. A further 5.34% passed only after a defect was put right at the test station.

Better than average: 3.3 points above the 86.87% figure for all motorcycles tested.

Pass rate 90.14% 878 of 974

Fixed at the station 5.34% passed after an on-the-spot repair

Average mileage at test 14,967 miles

Average age at test 16.1 years old

Engine 865cc MOT class 2

For sale now 0 Triumph BONNEVILLE T 100 (865) 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 43.2% of failed tests on this model.
Then check not working and excessively binding, the next two most common reasons.
The most common advisory is tread depth is below minimum requirements of 1.0mm (4.1% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 14,967 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
11-15 years	90.55%		476
16+ years	89.76%		498

Why the Triumph BONNEVILLE T 100 (865) 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	43.2%	19
2	Not working	38.6%	17
3	Excessively binding	29.5%	13
4	Missing	20.5%	9
5	Less than 1.0 mm thick	15.9%	7
6	Does not illuminate by the operation of both brake controls	13.6%	6
7	Too low	13.6%	6
8	Does not conform to the specified requirements	11.4%	5
9	Insecure	9.1%	4
10	Tread depth is below minimum requirements of 1.0mm	9.1%	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	Tread depth is below minimum requirements of 1.0mm	4.1%	40
2	Less than 1.0 mm thick	3.5%	34
3	Noise is clearly in excess of that emitted by a similar motorcycle fitted with a standard silencer in average condition	3.4%	33
4	Indicates excessive fluctuation of brake effort	2.2%	21
5	Excessively binding	1.8%	18
6	Excessively loose	1.5%	15
7	Excessively stiff or notchy	0.7%	7
8	Incorrect which adversely affects the handling	0.7%	7
9	Significantly and obviously worn	0.7%	7
10	Tread not clearly visible	0.6%	6

Triumph BONNEVILLE T 100 (865) for sale

No Triumph BONNEVILLE T 100 (865) in stock at the moment - 108 other Triumph bikes are advertised.

Used Triumph BONNEVILLE T 100 (865) 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 S 1000 · 999cc	8,445	91.96%	15,282
Yamaha YZF R1 · 998cc	6,022	88.01%	23,152
Yamaha MT 800-1000cc · 800-1000cc	5,720	90.98%	16,130
Honda NC · 741cc	5,311	89.53%	22,765

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

Triumph BONNEVILLE T 100 (865) MOT questions

What is the MOT pass rate for the Triumph BONNEVILLE T 100 (865)?+

90.14% of Triumph BONNEVILLE T 100 (865) MOT tests end in a pass, based on 974 tests in the DVSA dataset.

What is the most common MOT failure on a Triumph BONNEVILLE T 100 (865)?+

Too high, which appears in 43.2% of failed tests on this model.

Does the Triumph BONNEVILLE T 100 (865) get harder to pass as it ages?+

At 16+ years old the pass rate is 89.76%, against 90.55% for examples 11-15 years old.

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.