BIKERELIABILITY Reg check
League table/ HYOSUNG/GT 650 COMET
Model report · 2005–2025

HYOSUNG GT 650 COMET

647cc Petrol Class 2
#4471 of 5428 overall #5 of 23 HYOSUNGs #2723 of 2788 other bikes
73.3%
first-time pass rate
17.8%
failed outright
11,564
median miles at test
258
MOT tests, 2005–2025
-13.0pp
vs expected · age & mileage

The pass rate is the MOT first-time pass: a roadworthiness check of the items an MOT covers (brakes, lights, tyres, steering, structure, emissions), not a full mechanical inspection of engine or gearbox internals. It is a reliability signal, not a complete measure of mechanical reliability. What this measures.

“vs expected” adjusts for age, mileage and test class, so a cherished classic and a hard-used commuter are compared fairly. How this works.

Pass rate by mileage

how the GT 650 COMET's first-time pass rate falls with the odometer · class average 84.9%

A low-mileage GT 650 COMET passes first time 74.5% of the time; by 20k that's 59.6%.

56%69%82%0k: 74.5% pass (110 tests)10k: 78.2% pass (78 tests)20k: 59.6% pass (47 tests)0k10k20k

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 GT 650 COMET

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
brakes
42 37.8
lighting and signalling
20 18
tyres and wheels
12 10.8
lamps and reflectors
12 10.8
drive system
8 7.2
steering and suspension
7 6.3
fuel and exhaust
4 3.6
body and structure
2 1.8
driving controls
2 1.8
steering
2 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 GT 650 COMET beats 0 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

KAWASAKI ZX-6R 78.1% pass · 174k tests Compare head-to-head →
SUZUKI GSF600 77.3% pass · 143k tests Compare head-to-head →
YAMAHA FZS600 82.6% pass · 137k tests Compare head-to-head →
HONDA VFR800 FI 86.7% pass · 89.4k tests Compare head-to-head →

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 GT 650 COMET.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the GT 650 Comet

More HYOSUNG models

other HYOSUNG bikes ranked by MOT pass rate
HYOSUNG CRUISE II 64.0% pass · 4,590 tests
HYOSUNG GT125 58.6% pass · 2,449 tests
HYOSUNG GT 125 R 58.2% pass · 2,286 tests
HYOSUNG GV125 63.9% pass · 2,280 tests
HYOSUNG GT 65.6% pass · 1,989 tests
HYOSUNG GV 650 79.2% pass · 1,927 tests

See all HYOSUNG models →

Pass rate by registration year

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

Best year to buy used: 2006 (65.6% pass). Weakest: 2006 (65.6%).

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.

Embed this bike

Free to embed on your site, blog or forum — a live Hyosung GT 650 Comet reliability card that stays up to date and links back here. More on the free API page.