YAMAHA SRX400

399cc Petrol Class 2

#4616 of 5426 overall #352 of 409 YAMAHAs #2762 of 2787 other bikes

71.4%

first-time pass rate

16.6%

failed outright

30,224

median miles at test

723

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2017

The SRX400's first-time pass rate has risen 9.6 points since 2006, 71.0% to 80.6%.

Pass rate by mileage

how the SRX400's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage SRX400 passes first time 81.4% of the time; by 50k that's 65.5%.

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 SRX400

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	70	24.1	1.6×
steering and suspension	68	23.4	2.2×
brakes	49	16.9	1.3×
drive system	30	10.3	3.1×
tyres and wheels	18	6.2	1.0×
fuel and exhaust	12	4.1	2.2×
structure and attachments	12	4.1	1.2×
lamps and reflectors	12	4.1	0.8×
suspension	10	3.4	1.5×
reg plates and vin	9	3.1	2.2×

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 SRX400 beats 0 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 SRX400.

Pass rate by registration year

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

Best year to buy used: 1991 (80.0% pass). Weakest: 1986 (64.2%).

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 SRX400 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA SRX400 reliable?

The YAMAHA SRX400 is less reliable than average for its class: 71.4% of its 723 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #4616 of 5426 models.

What does a SRX400 fail its MOT on most?

lighting and signalling — 24% of all defects recorded against failed SRX400 tests.

What is the best year of SRX400 to buy used?

By first-time pass rate, 1991-registered examples do best (80.0%) and 1986 worst (64.2%). Condition and history still trump the year.

How many miles will a SRX400 last?

The median SRX400 shows 30,224 miles at test, and examples around 50k miles still pass 65.5% of the time — mileage alone rarely kills one.