YAMAHA YP400

395cc Petrol Class 2

#2264 of 5426 overall #111 of 409 YAMAHAs #1406 of 2787 other bikes

85.8%

first-time pass rate

10.3%

failed outright

15,530

median miles at test

4,780

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2007–2025

The YP400's first-time pass rate has fallen 2.5 points since 2007, 89.3% to 86.8%.

Pass rate by mileage

how the YP400's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage YP400 passes first time 91.4% of the time; by 50k that's 68.5%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a YP400

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	454	47.6	1.5×
tyres and wheels	118	12.4	1.0×
steering and suspension	105	11	0.5×
tyres	69	7.2	2.0×
lamps and reflectors	54	5.7	0.6×
suspension	53	5.6	1.2×
lighting and signalling	50	5.2	0.2×
steering	20	2.1	0.9×
structure and attachments	15	1.6	0.4×
fuel and exhaust	15	1.6	0.4×

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects. "vs all bikes" is how often this model's tests record a defect in the group, as a multiple of the all-bike rate.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the YP400 beats 3 of its 4 closest rivals (KAWASAKI ER5, SUZUKI GS500, SUZUKI AN400).

KAWASAKI ER5 77.4% pass · 53.1k tests SUZUKI GS500 76.4% pass · 44.9k tests SUZUKI AN400 86.2% pass · 27.1k tests SUZUKI DR-Z400S 80.4% pass · 26.8k tests

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the YP400.

Pass rate by registration year

how each model-year cohort fares · registration year from first use date

Best year to buy used: 2014 (93.8% pass). Weakest: 2008 (81.9%).

First-time pass rate by the year each bike was first registered (cohorts with ≥ 50 tests). Older cohorts are survivors: the worst examples have already left the road, which tends to lift the earliest years.

YAMAHA YP400 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA YP400 reliable?

The YAMAHA YP400 is about average for its class: 85.8% of its 4,780 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #2264 of 5426 models.

What does a YP400 fail its MOT on most?

brakes — 48% of all defects recorded against failed YP400 tests.

What is the best year of YP400 to buy used?

By first-time pass rate, 2014-registered examples do best (93.8%) and 2008 worst (81.9%). Condition and history still trump the year.

How many miles will a YP400 last?

The median YP400 shows 15,530 miles at test, and examples around 50k miles still pass 68.5% of the time — mileage alone rarely kills one.