YAMAHA DT250MX

246cc Petrol Class 2

#3647 of 5426 overall #242 of 409 YAMAHAs #2324 of 2787 other bikes

79.7%

first-time pass rate

12.1%

failed outright

13,744

median miles at test

232

MOT tests, 2005–2025

Pass rate by mileage

how the DT250MX's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage DT250MX passes first time 73.9% of the time; by 20k that's 86.2%.

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 DT250MX

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	41	58.6
brakes	7	10
tyres and wheels	5	7.1
lamps and reflectors	5	7.1
steering and suspension	5	7.1
fuel and exhaust	2	2.9
reg plates and vin	2	2.9
audible warning (Horn)	1	1.4
Items Not Tested	1	1.4
structure and attachments	1	1.4

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the DT250MX beats 2 of its 4 closest rivals (YAMAHA YP250, YAMAHA WR250F, HONDA XR250).

YAMAHA YP250 82.5% pass · 12.4k tests YAMAHA WR250F 78.0% pass · 10.5k tests HONDA XR250 78.8% pass · 9,277 tests HONDA CBF250 84.9% pass · 7,536 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 DT250MX.

Pass rate by registration year

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

Best year to buy used: 1979 (79.7% pass). Weakest: 1979 (79.7%).

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.