BIKERELIABILITY Reg check
League table/ PIAGGIO/PK125
Model report · 2005–2025

PIAGGIO PK125

124cc Petrol Class 1
#3649 of 5428 overall #74 of 136 PIAGGIOs #206 of 412 scooter bikes
79.7%
first-time pass rate
12.8%
failed outright
9,994
median miles at test
5,121
MOT tests, 2005–2025
+5.0pp
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 · 2005–2025

The PK125's first-time pass rate has risen 2.6 points since 2005, 84.9% to 87.5%.

66%80%94%2005: 84.9% pass (53 tests)2006: 76.7% pass (253 tests)2007: 75.3% pass (247 tests)2008: 71.1% pass (277 tests)2009: 75.4% pass (305 tests)2010: 77.7% pass (287 tests)2011: 77.6% pass (304 tests)2012: 76.1% pass (310 tests)2013: 79.5% pass (292 tests)2014: 79.5% pass (298 tests)2015: 85.0% pass (293 tests)2016: 80.9% pass (288 tests)2017: 78.6% pass (313 tests)2018: 83.2% pass (214 tests)2019: 83.9% pass (205 tests)2020: 77.3% pass (185 tests)2021: 84.3% pass (236 tests)2022: 80.3% pass (223 tests)2023: 83.0% pass (224 tests)2024: 89.6% pass (154 tests)2025: 87.5% pass (160 tests)20052025

Pass rate by mileage

how the PK125's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage PK125 passes first time 81.6% of the time; by 40k that's 80.4%.

75%79%83%0k: 81.6% pass (2,550 tests)10k: 77.7% pass (1,749 tests)20k: 76.3% pass (527 tests)30k: 79.2% pass (178 tests)40k: 80.4% pass (56 tests)0k20k40k

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 PK125

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
606 39.8 1.6×
brakes
250 16.4 0.8×
lamps and reflectors
172 11.3 1.1×
steering and suspension
163 10.7 0.8×
tyres and wheels
143 9.4 1.3×
fuel and exhaust
56 3.7 1.2×
reg plates and vin
42 2.8 1.3×
suspension
33 2.2 0.8×
body and structure
30 2 1.2×
tyres
27 1.8 0.6×

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 PK125 beats 1 of its 4 closest rivals (PIAGGIO VESPA, HONDA PCX 125, HONDA Vision 110).

PIAGGIO VESPA 80.7% pass · 287k tests Compare head-to-head →
HONDA PCX 125 81.1% pass · 88.6k tests Compare head-to-head →
HONDA Vision 110 78.1% pass · 50.9k tests Compare head-to-head →
YAMAHA NMAX 125 82.2% pass · 33.8k 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 PK125.

Compare with any bike

rival not listed above? pick any model to see it head-to-head with the PK125

More PIAGGIO models

other PIAGGIO bikes ranked by MOT pass rate
PIAGGIO VESPA 80.7% pass · 287k tests
PIAGGIO ZIP 71.3% pass · 79.0k tests
PIAGGIO NRG 65.5% pass · 40.5k tests
PIAGGIO PX 125 (VESPA) 81.0% pass · 33.2k tests
PIAGGIO PX 200 E 86.5% pass · 28.4k tests
PIAGGIO ET2 73.6% pass · 25.0k tests

See all PIAGGIO models →

Pass rate by registration year

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

Best year to buy used: 2005 (87.6% pass). Weakest: 2000 (72.9%).

70%80%91%1983: 78.8% pass (113 tests)1984: 80.0% pass (115 tests)1985: 76.6% pass (64 tests)1986: 76.7% pass (60 tests)1987: 76.8% pass (56 tests)1999: 77.0% pass (1,736 tests)2000: 72.9% pass (240 tests)2001: 79.0% pass (443 tests)2002: 81.0% pass (379 tests)2003: 81.6% pass (412 tests)2004: 76.5% pass (285 tests)2005: 87.6% pass (194 tests)2006: 84.4% pass (270 tests)2007: 86.2% pass (261 tests)2008: 84.2% pass (215 tests)198320012008

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.

PIAGGIO PK125 FAQ

answers computed from the data above · terms in the glossary

Is the PIAGGIO PK125 reliable?

The PIAGGIO PK125 is more reliable than average for its class: 79.7% of its 5,121 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #3649 of 5428 models.

What does a PK125 fail its MOT on most?

lighting and signalling — 40% of all defects recorded against failed PK125 tests.

What is the best year of PK125 to buy used?

By first-time pass rate, 2005-registered examples do best (87.6%) and 2000 worst (72.9%). Condition and history still trump the year.

How many miles will a PK125 last?

The median PK125 shows 9,994 miles at test, and examples around 40k miles still pass 80.4% of the time — mileage alone rarely kills one.

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