SUZUKI RG400

398cc Petrol Class 2

#263 of 5426 overall #30 of 680 SUZUKIs #164 of 2787 other bikes

93.2%

first-time pass rate

3.0%

failed outright

18,501

median miles at test

235

MOT tests, 2005–2025

Pass rate by mileage

how the RG400's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage RG400 passes first time 94.8% of the time; by 20k that's 97.3%.

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 RG400

failure defects by component group · advisories excluded

Component group	Defects	% of defects
tyres	5	23.8
lamps and reflectors	4	19
steering and suspension	3	14.3
suspension	2	9.5
brakes	2	9.5
lighting and signalling	2	9.5
tyres and wheels	1	4.8
fuel and exhaust	1	4.8
Identification of the vehicle	1	4.8

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 RG400 beats 4 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 RG400.

Pass rate by registration year

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

Best year to buy used: 1986 (94.3% pass). Weakest: 1985 (92.4%).

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.