Sinnis TERRAIN 125 MOT pass rate and common failures

Sinnis TERRAIN 125 motorcycles pass the MOT 72.69% of the time, measured across 454 tests in the DVSA record. A further 6.83% passed only after a defect was put right at the test station.

Worse than average: 14.2 points below the 86.87% figure for all motorcycles tested.

Pass rate 72.69% 330 of 454

Fixed at the station 6.83% passed after an on-the-spot repair

Average mileage at test 7,590 miles

Average age at test 3.57 years old

Engine 125cc MOT class 1 and 2

For sale now 0 Sinnis TERRAIN 125 adverts

What to check before the MOT

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

Start with excessively binding - it accounts for 28% of failed tests on this model.
Then check inoperative in the case of a single lamp or all lamps and excessively loose, the next two most common reasons.
The most common advisory is excessively loose (9.3% of all tests) - not a failure, but money you will spend sooner or later.
Average recorded mileage at test is 7,590 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	72.69%		454

Why the Sinnis TERRAIN 125 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	Excessively binding	28%	26
2	Inoperative in the case of a single lamp or all lamps	26.9%	25
3	Excessively loose	17.2%	16
4	Not working	16.1%	15
5	Tread depth is below minimum requirements of 1.0mm	16.1%	15
6	Less than 1.0 mm thick	14%	13
7	Does not illuminate simultaneously with the position lamp(s)	12.9%	12
8	Has a serious fluid leak	8.6%	8
9	Has negligible damping effect	8.6%	8
10	Does not illuminate by the operation of both brake controls	7.5%	7

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	9.3%	42
2	Worn to excess	8.1%	37
3	Tread depth is below minimum requirements of 1.0mm	7.7%	35
4	Excessively binding	7.5%	34
5	Less than 1.0 mm thick	7.3%	33
6	Sprocket worn to excess	4.2%	19
7	Excessively stiff or notchy	3.3%	15
8	Has excessive wear or free play	3.1%	14
9	Has a serious fluid leak	2%	9
10	Excessively tight	1.8%	8

Sinnis TERRAIN 125 for sale

No Sinnis TERRAIN 125 in stock at the moment - 0 other Sinnis bikes are advertised.

Used Sinnis TERRAIN 125 Used Sinnis All Sinnis Sinnis MOT statistics

Similar bikes compared

Models of comparable capacity, so the comparison means something.

Model	Tests	Pass rate	Avg mileage
Yamaha GPD125-A NMAX 125 · 125cc	8,762	80.8%	45,039
Piaggio VESPA 79-210cc · 79-210cc	8,363	85.42%	11,710
Honda WW · 125cc	7,252	80.32%	40,134
Honda WW 125 A-M · 125cc	5,011	84.06%	29,846
Honda GLR · 125cc	4,737	79.99%	14,642
Honda CBF 100-125cc · 100-125cc	3,204	77%	15,203

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

Sinnis TERRAIN 125 MOT questions

What is the MOT pass rate for the Sinnis TERRAIN 125?+

72.69% of Sinnis TERRAIN 125 MOT tests end in a pass, based on 454 tests in the DVSA dataset.

What is the most common MOT failure on a Sinnis TERRAIN 125?+

Excessively binding, which appears in 28% 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.