SINNIS RSX 125

125cc Petrol Class 1

#5278 of 5426 overall #16 of 16 SINNISs #657 of 734 commuter bikes

57.9%

first-time pass rate

31.8%

failed outright

6,749

median miles at test

746

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2020–2025

The RSX 125's first-time pass rate has fallen 20.5 points since 2020, 69.0% to 48.5%.

Pass rate by mileage

how the RSX 125's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage RSX 125 passes first time 61.4% of the time; by 20k that's 32.3%.

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 RSX 125

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lamps and reflectors	213	26.4	11.5×
brakes	211	26.1	3.7×
structure and attachments	166	20.6	22.5×
suspension	120	14.9	16.7×
steering	46	5.7	11.9×
audible warning (Horn)	23	2.9	16.1×
tyres	21	2.6	3.3×
Identification of the vehicle	5	0.6	2.9×
wheels	2	0.2	4.5×

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 RSX 125 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 RSX 125.

Pass rate by registration year

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

Best year to buy used: 2018 (61.0% pass). Weakest: 2021 (42.9%).

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.

SINNIS RSX 125 FAQ

answers computed from the data above · terms in the glossary

Is the SINNIS RSX 125 reliable?

The SINNIS RSX 125 is less reliable than average for its class: 57.9% of its 746 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5278 of 5426 models.

What does a RSX 125 fail its MOT on most?

lamps and reflectors — 26% of all defects recorded against failed RSX 125 tests.

What is the best year of RSX 125 to buy used?

By first-time pass rate, 2018-registered examples do best (61.0%) and 2021 worst (42.9%). Condition and history still trump the year.

How many miles will a RSX 125 last?

The median RSX 125 shows 6,749 miles at test, and examples around 20k miles still pass 32.3% of the time — mileage alone rarely kills one.