Aprilia Atlantic 500 vs Suzuki AN400

The Suzuki AN400 passes its MOT first time more often than the Aprilia Atlantic 500: 86.2% vs 83.9%, a 2.3-point lead.

MOT reliability, side by side

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

Metric	Aprilia Atlantic 500	Suzuki AN400
First-time pass rate	83.9%	86.2%
Outright fail rate	12.0%	9.8%
Vs comparable bikes (age & mileage adjusted)	-2.1 pts	+1.3 pts
Engine size	459cc	385cc
Rank among all models	#2767 of 5428	#2148 of 5428
Median miles at test	11,421	15,861
MOT tests analysed	1,332	27,056
Most common failure	brakes	brakes

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	Aprilia Atlantic 500	Suzuki AN400
Brakes	5.7%	4.4%
Tyres & wheels	3.9%	3.2%
Steering & suspension	4.6%	2.3%
Lights & signalling	3.0%	2.6%
Fuel & exhaust	0.4%	0.4%
Structure & body	0.2%	0.3%

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	Aprilia Atlantic 500	Suzuki AN400
2016	87.5%	85.5%
2017	81.4%	86.8%
2018	70.8%	85.7%
2019	87.8%	84.4%
2020	82.4%	84.5%
2021	92.9%	85.1%
2022	86.7%	83.0%
2023	73.3%	83.0%

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	Aprilia Atlantic 500	Suzuki AN400
0k-10k miles	85.3%	91.7%
10k-20k miles	84.1%	86.7%
20k-30k miles	81.3%	82.7%
30k-40k miles	77.3%	81.0%
40k-50k miles	90.9%	79.7%

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

Aprilia Atlantic 500 vs Suzuki AN400 FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Aprilia Atlantic 500 or the Suzuki AN400?

The Suzuki AN400 passes its MOT first time more often than the Aprilia Atlantic 500: 86.2% vs 83.9%, a 2.3-point lead. Adjusted for age, mileage and test class, the Suzuki AN400 still comes out ahead: -2.1 points vs comparable bikes for the Aprilia Atlantic 500, +1.3 for the Suzuki AN400. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Aprilia Atlantic 500 fail its MOT on most?

Brakes: 5.7% of Aprilia Atlantic 500 MOT tests failed on it, then steering & suspension (4.6%).

What does the Suzuki AN400 fail its MOT on most?

Brakes: 4.4% of Suzuki AN400 MOT tests failed on it, then tyres & wheels (3.2%).

Which holds up better at high mileage, the Aprilia Atlantic 500 or the Suzuki AN400?

At 40k-50k miles the Aprilia Atlantic 500 passes first time more often: 90.9% for the Aprilia Atlantic 500 vs 79.7% for the Suzuki AN400.

APRILIA ATLANTIC 500 83.9% pass · 1,332 tests SUZUKI AN400 86.2% pass · 27.1k tests

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