HYOSUNG RX125

125cc Petrol Class 1

#5293 of 5426 overall #21 of 23 HYOSUNGs #667 of 734 commuter bikes

57.3%

first-time pass rate

29.6%

failed outright

8,956

median miles at test

922

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2006–2017

The RX125's first-time pass rate has fallen 10.1 points since 2006, 66.0% to 55.9%.

Pass rate by mileage

how the RX125's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage RX125 passes first time 60.4% of the time; by 20k that's 56.6%.

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 RX125

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	351	32	4.6×
brakes	197	17.9	3.1×
drive system	181	16.5	15.6×
steering and suspension	137	12.5	3.5×
tyres and wheels	72	6.6	3.0×
body and structure	48	4.4	7.5×
lamps and reflectors	37	3.4	1.2×
fuel and exhaust	35	3.2	4.0×
reg plates and vin	22	2	3.6×
structure and attachments	18	1.6	1.6×

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 RX125 beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

YAMAHA YBR 125 71.0% pass · 125k tests HONDA CG125 72.2% pass · 89.3k tests HONDA CBF125 73.3% pass · 84.4k tests GILERA RUNNER 70.8% pass · 69.9k 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 RX125.

Pass rate by registration year

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

Best year to buy used: 2003 (65.0% pass). Weakest: 2002 (43.8%).

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 RX125 FAQ

answers computed from the data above · terms in the glossary

Is the HYOSUNG RX125 reliable?

The HYOSUNG RX125 is less reliable than average for its class: 57.3% of its 922 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5293 of 5426 models.

What does a RX125 fail its MOT on most?

lighting and signalling — 32% of all defects recorded against failed RX125 tests.

What is the best year of RX125 to buy used?

By first-time pass rate, 2003-registered examples do best (65.0%) and 2002 worst (43.8%). Condition and history still trump the year.

How many miles will a RX125 last?

The median RX125 shows 8,956 miles at test, and examples around 20k miles still pass 56.6% of the time — mileage alone rarely kills one.