YAMAHA TT600

599cc Petrol Class 2

#4469 of 5426 overall #343 of 409 YAMAHAs #2722 of 2787 other bikes

73.3%

first-time pass rate

13.7%

failed outright

14,268

median miles at test

285

MOT tests, 2005–2025

Pass rate by mileage

how the TT600's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage TT600 passes first time 79.2% of the time; by 20k that's 78.0%.

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 TT600

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lighting and signalling	48	38.4
steering and suspension	23	18.4
brakes	19	15.2
tyres and wheels	16	12.8
reg plates and vin	6	4.8
fuel and exhaust	5	4
lamps and reflectors	3	2.4
drive system	3	2.4
suspension	1	0.8
audible warning (Horn)	1	0.8

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 TT600 beats 0 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 TT600.

Pass rate by registration year

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

Best year to buy used: 2001 (76.7% pass). Weakest: 2001 (76.7%).

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.