YAMAHA XTZ660

659cc Petrol Class 2

#3109 of 5426 overall #190 of 409 YAMAHAs #1979 of 2787 other bikes

82.4%

first-time pass rate

10.4%

failed outright

24,737

median miles at test

2,847

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2025

The XTZ660's first-time pass rate has risen 3.4 points since 2005, 85.7% to 89.1%.

Pass rate by mileage

how the XTZ660's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage XTZ660 passes first time 89.7% of the time; by 50k that's 79.7%.

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 XTZ660

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	163	26.6	1.0×
lighting and signalling	119	19.4	0.8×
steering and suspension	112	18.3	1.1×
tyres and wheels	53	8.6	0.8×
lamps and reflectors	53	8.6	0.9×
drive system	42	6.9	1.6×
structure and attachments	21	3.4	0.7×
suspension	19	3.1	0.7×
reg plates and vin	17	2.8	1.0×
fuel and exhaust	14	2.3	0.6×

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 XTZ660 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 HONDA VFR800 FI 86.7% pass · 89.4k 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 XTZ660.

Pass rate by registration year

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

Best year to buy used: 2008 (89.8% pass). Weakest: 1994 (70.1%).

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 XTZ660 FAQ

answers computed from the data above · terms in the glossary

Is the YAMAHA XTZ660 reliable?

The YAMAHA XTZ660 is less reliable than average for its class: 82.4% of its 2,847 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #3109 of 5426 models.

What does a XTZ660 fail its MOT on most?

brakes — 27% of all defects recorded against failed XTZ660 tests.

What is the best year of XTZ660 to buy used?

By first-time pass rate, 2008-registered examples do best (89.8%) and 1994 worst (70.1%). Condition and history still trump the year.

How many miles will a XTZ660 last?

The median XTZ660 shows 24,737 miles at test, and examples around 50k miles still pass 79.7% of the time — mileage alone rarely kills one.