YAMAHA XZ550

552cc Petrol Class 2

80.5%

first-time pass rate

12.1%

failed outright

25,889

median miles at test

190

MOT tests, 2005–2025

What fails on a XZ550

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	18	32.1
brakes	16	28.6
steering and suspension	7	12.5
fuel and exhaust	6	10.7
tyres and wheels	3	5.4
structure and attachments	2	3.6
suspension	2	3.6
driving controls	1	1.8
body and structure	1	1.8

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 XZ550 beats 2 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

KAWASAKI ZX-6R 78.1% pass · 174k tests SUZUKI GSF600 77.3% pass · 143k tests YAMAHA FZS600 82.6% pass · 137k tests SUZUKI SV650S 80.6% pass · 84.6k 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 XZ550.

Pass rate by registration year

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

Best year to buy used: 1982 (79.3% pass). Weakest: 1982 (79.3%).

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.