HYOSUNG GT650

647cc Petrol Class 2

#4589 of 5426 overall #6 of 23 HYOSUNGs #2754 of 2787 other bikes

71.9%

first-time pass rate

18.3%

failed outright

7,984

median miles at test

739

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2010–2023

The GT650's first-time pass rate has fallen 2.5 points since 2010, 69.2% to 66.7%.

Pass rate by mileage

how the GT650's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage GT650 passes first time 74.6% of the time; by 20k that's 76.5%.

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 GT650

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	96	31.1	2.1×
lighting and signalling	85	27.5	2.0×
steering and suspension	37	12	1.3×
tyres and wheels	25	8.1	1.5×
drive system	17	5.5	2.4×
lamps and reflectors	16	5.2	1.0×
suspension	11	3.6	1.3×
tyres	8	2.6	1.6×
structure and attachments	8	2.6	0.8×
body and structure	6	1.9	1.1×

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 GT650 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 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 GT650.

Pass rate by registration year

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

Best year to buy used: 2009 (77.1% pass). Weakest: 2006 (64.7%).

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.

HYOSUNG GT650 FAQ

answers computed from the data above · terms in the glossary

Is the HYOSUNG GT650 reliable?

The HYOSUNG GT650 is less reliable than average for its class: 71.9% of its 739 MOT tests (2005–2025) passed first time, against a class average of 84.9%. That ranks it #4589 of 5426 models.

What does a GT650 fail its MOT on most?

brakes — 31% of all defects recorded against failed GT650 tests.

What is the best year of GT650 to buy used?

By first-time pass rate, 2009-registered examples do best (77.1%) and 2006 worst (64.7%). Condition and history still trump the year.

How many miles will a GT650 last?

The median GT650 shows 7,984 miles at test, and examples around 20k miles still pass 76.5% of the time — mileage alone rarely kills one.