SUZUKI RG125

124cc Petrol Class 1

#5143 of 5426 overall #676 of 680 SUZUKIs #587 of 734 commuter bikes

62.0%

first-time pass rate

27.8%

failed outright

20,230

median miles at test

1,593

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2023

The RG125's first-time pass rate has risen 14.4 points since 2005, 70.0% to 84.4%.

Pass rate by mileage

how the RG125's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage RG125 passes first time 75.8% of the time; by 40k that's 59.5%.

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 RG125

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	570	32.7	4.4×
steering and suspension	411	23.6	4.9×
brakes	368	21.1	3.3×
drive system	107	6.1	7.0×
body and structure	99	5.7	10.3×
tyres and wheels	70	4	1.9×
fuel and exhaust	51	2.9	4.0×
reg plates and vin	34	1.9	3.4×
lamps and reflectors	22	1.3	0.5×
structure and attachments	13	0.7	1.0×

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 RG125 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 RG125.

Pass rate by registration year

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

Best year to buy used: 1989 (76.2% pass). Weakest: 1987 (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.

SUZUKI RG125 FAQ

answers computed from the data above · terms in the glossary

Is the SUZUKI RG125 reliable?

The SUZUKI RG125 is less reliable than average for its class: 62.0% of its 1,593 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5143 of 5426 models.

What does a RG125 fail its MOT on most?

lighting and signalling — 33% of all defects recorded against failed RG125 tests.

What is the best year of RG125 to buy used?

By first-time pass rate, 1989-registered examples do best (76.2%) and 1987 worst (43.8%). Condition and history still trump the year.

How many miles will a RG125 last?

The median RG125 shows 20,230 miles at test, and examples around 40k miles still pass 59.5% of the time — mileage alone rarely kills one.