DERBI GPR 50

49cc Petrol Class 1

#5342 of 5426 overall #15 of 19 DERBIs #413 of 455 moped bikes

54.7%

first-time pass rate

35.2%

failed outright

10,576

median miles at test

1,847

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2022

The GPR 50's first-time pass rate has fallen 6.0 points since 2005, 58.5% to 52.5%.

Pass rate by mileage

how the GPR 50's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage GPR 50 passes first time 57.5% of the time; by 30k that's 37.5%.

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 GPR 50

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
lighting and signalling	817	32.6	5.4×
steering and suspension	605	24.1	6.1×
brakes	452	18	3.6×
drive system	191	7.6	10.3×
body and structure	135	5.4	11.2×
tyres and wheels	70	2.8	1.5×
fuel and exhaust	70	2.8	4.3×
lamps and reflectors	68	2.7	1.3×
structure and attachments	61	2.4	3.1×
suspension	37	1.5	1.8×

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 GPR 50 beats 0 of its 4 closest rivals (PEUGEOT SPEEDFIGHT, PIAGGIO ZIP, PIAGGIO NRG).

PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests PIAGGIO ZIP 71.3% pass · 79.0k tests PIAGGIO NRG 65.5% pass · 40.5k tests PEUGEOT VIVACITY 70.4% pass · 29.7k 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 GPR 50.

Pass rate by registration year

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

Best year to buy used: 2010 (75.0% pass). Weakest: 2000 (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.

DERBI GPR 50 FAQ

answers computed from the data above · terms in the glossary

Is the DERBI GPR 50 reliable?

The DERBI GPR 50 is less reliable than average for its class: 54.7% of its 1,847 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5342 of 5426 models.

What does a GPR 50 fail its MOT on most?

lighting and signalling — 33% of all defects recorded against failed GPR 50 tests.

What is the best year of GPR 50 to buy used?

By first-time pass rate, 2010-registered examples do best (75.0%) and 2000 worst (42.9%). Condition and history still trump the year.

How many miles will a GPR 50 last?

The median GPR 50 shows 10,576 miles at test, and examples around 30k miles still pass 37.5% of the time — mileage alone rarely kills one.