Keeway F-Act 50 vs Piaggio NRG

The Keeway F-Act 50 passes its MOT first time more often than the Piaggio NRG: 66.2% vs 65.5%, a 0.7-point lead.

MOT reliability, side by side

first-time pass rate, outright fail rate and tests analysed · 2005–2025

Metric	Keeway F-Act 50	Piaggio NRG
First-time pass rate	66.2%	65.5%
Outright fail rate	25.8%	27.4%
Vs comparable bikes (age & mileage adjusted)	-7.7 pts	-6.0 pts
Engine size	49cc	49cc
Rank among all models	#4957 of 5428	#4992 of 5428
Median miles at test	5,966	9,874
MOT tests analysed	710	40,458
Most common failure	lighting and signalling	lighting and signalling

First-time outcomes on normal tests, 2005–2025. "Most common failure" is the component group with the most recorded defects on failed tests. Read pass rates against test counts: a smaller sample is noisier. Source: DVSA anonymised MOT results.

"Vs comparable bikes" is the first-time pass rate minus the rate expected for each bike's own mix of age, mileage and test class, in percentage points: positive means better than comparable bikes. How this works.

What fails, side by side

share of each bike's MOT tests that failed on the component · lower is better

Component	Keeway F-Act 50	Piaggio NRG
Lights & signalling	13.7%	15.0%
Steering & suspension	10.6%	15.5%
Brakes	12.1%	10.2%
Tyres & wheels	4.1%	4.7%
Fuel & exhaust	3.9%	3.8%
Structure & body	1.8%	2.5%

A test that fails on two components counts once in each. Component links go to the bikes most likely to fail on it.

Pass rate by test year

first-time MOT pass rate in each calendar year both bikes were tested

Test year	Keeway F-Act 50	Piaggio NRG
2010	72.5%	63.2%
2011	68.2%	63.9%
2012	57.8%	63.4%
2013	68.6%	64.1%
2014	69.2%	67.4%
2015	63.0%	68.8%
2016	67.3%	68.0%
2017	62.8%	72.0%

Each year mixes bikes of different ages, so a fleet that is getting older tends to slip.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Keeway F-Act 50	Piaggio NRG
0k-10k miles	66.4%	71.3%
10k-20k miles	67.2%	60.6%

Bands with fewer than 30 tests for either bike are left out.

Keeway F-Act 50 vs Piaggio NRG FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Keeway F-Act 50 or the Piaggio NRG?

The Keeway F-Act 50 passes its MOT first time more often than the Piaggio NRG: 66.2% vs 65.5%, a 0.7-point lead. Adjusted for age, mileage and test class, the Piaggio NRG still comes out ahead: -7.7 points vs comparable bikes for the Keeway F-Act 50, -6.0 for the Piaggio NRG. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Keeway F-Act 50 fail its MOT on most?

Lights & signalling: 13.7% of Keeway F-Act 50 MOT tests failed on it, then brakes (12.1%).

What does the Piaggio NRG fail its MOT on most?

Steering & suspension: 15.5% of Piaggio NRG MOT tests failed on it, then lights & signalling (15.0%).

KEEWAY F-ACT 50 66.2% pass · 710 tests PIAGGIO NRG 65.5% pass · 40.5k tests

See each bike's full report (trend, mileage curve, failure breakdown and rivals) on its own page.