BIKERELIABILITY Reg check
Model report · 2005–2025

JONWAY R3-125

125cc Petrol Class 1
59.2%
first-time pass rate
33.1%
failed outright
4,398
median miles at test
130
MOT tests, 2005–2025
-16.7pp
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.

What fails on a R3-125

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects
lighting and signalling
38 28.4
steering and suspension
34 25.4
brakes
30 22.4
tyres and wheels
12 9
fuel and exhaust
9 6.7
body and structure
5 3.7
Items Not Tested
3 2.2
reg plates and vin
2 1.5
driving controls
1 0.7

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 R3-125 beats 0 of its 4 closest rivals (YAMAHA YBR 125, HONDA CG125, HONDA CBF125).

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 R3-125.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the R3-125

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