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League table/ KEEWAY/RKS 125 STD
Model report · 2005–2025

KEEWAY RKS 125 STD

125cc Petrol Class 1
#4954 of 5428 overall #10 of 23 KEEWAYs #492 of 734 commuter bikes
66.3%
first-time pass rate
24.5%
failed outright
5,906
median miles at test
922
MOT tests, 2005–2025
-8.8pp
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 over time

first-time pass rate by test year · 2021–2025

The RKS 125 STD's first-time pass rate has held steady since 2021 (65.3% → 66.0%).

62%67%73%2021: 65.3% pass (124 tests)2022: 70.9% pass (175 tests)2023: 65.0% pass (280 tests)2024: 63.9% pass (183 tests)2025: 66.0% pass (150 tests)20212025

What fails on a RKS 125 STD

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lamps and reflectors
225 35.3 10.7×
structure and attachments
130 20.4 14.9×
brakes
122 19.2 2.2×
suspension
78 12.2 9.0×
steering
43 6.8 9.9×
tyres
24 3.8 3.8×
audible warning (Horn)
6 0.9 3.6×
Identification of the vehicle
5 0.8 2.3×
wheels
4 0.6 5.4×

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

YAMAHA YBR 125 71.0% pass · 125k tests Compare head-to-head →
HONDA CG125 72.2% pass · 89.3k tests Compare head-to-head →
HONDA CBF125 73.3% pass · 84.4k tests Compare head-to-head →
GILERA RUNNER 70.8% pass · 69.9k 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 RKS 125 STD.

Compare with any bike

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

More KEEWAY models

other KEEWAY bikes ranked by MOT pass rate
KEEWAY SUPERLIGHT 63.5% pass · 9,217 tests
KEEWAY RK 63.3% pass · 2,401 tests
KEEWAY TX 58.1% pass · 1,433 tests
KEEWAY HURRICANE 59.2% pass · 1,320 tests
KEEWAY SUPERLIGHT 125 E5 68.4% pass · 1,113 tests
KEEWAY SPEED 57.0% pass · 863 tests

See all KEEWAY models →

Pass rate by registration year

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

Best year to buy used: 2019 (67.6% pass). Weakest: 2018 (65.1%).

64%66%68%2018: 65.1% pass (390 tests)2019: 67.6% pass (182 tests)2020: 66.8% pass (283 tests)201820192020

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.

KEEWAY RKS 125 STD FAQ

answers computed from the data above · terms in the glossary

Is the KEEWAY RKS 125 STD reliable?

The KEEWAY RKS 125 STD is less reliable than average for its class: 66.3% of its 922 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4954 of 5428 models.

What does a RKS 125 STD fail its MOT on most?

lamps and reflectors — 35% of all defects recorded against failed RKS 125 STD tests.

What is the best year of RKS 125 STD to buy used?

By first-time pass rate, 2019-registered examples do best (67.6%) and 2018 worst (65.1%). Condition and history still trump the year.

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