SYM DD50 vs Peugeot Speedfight

The SYM DD50 passes its MOT first time more often than the Peugeot Speedfight: 73.3% vs 65.2%, a 8.1-point lead.

MOT reliability, side by side

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

Metric	SYM DD50	Peugeot Speedfight
First-time pass rate	73.3%	65.2%
Outright fail rate	18.8%	26.3%
Vs comparable bikes (age & mileage adjusted)	+1.1 pts	-5.3 pts
Engine size	49cc	49cc
Rank among all models	#4471 of 5428	#5008 of 5428
Median miles at test	9,008	13,547
MOT tests analysed	5,940	83,728
Most common failure	brakes	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	SYM DD50	Peugeot Speedfight
Lights & signalling	8.1%	15.4%
Brakes	10.6%	10.8%
Steering & suspension	4.8%	12.9%
Tyres & wheels	4.0%	4.7%
Fuel & exhaust	2.6%	2.5%
Structure & body	0.6%	2.3%

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	SYM DD50	Peugeot Speedfight
2016	70.6%	63.0%
2017	71.9%	68.5%
2018	78.2%	69.6%
2019	82.1%	68.9%
2020	70.8%	72.0%
2021	76.1%	71.0%
2022	72.5%	71.7%
2023	77.8%	71.0%

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	SYM DD50	Peugeot Speedfight
0k-10k miles	77.7%	73.1%
10k-20k miles	68.3%	63.3%
20k-30k miles	66.4%	58.2%
30k-40k miles	62.0%	56.6%

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

SYM DD50 vs Peugeot Speedfight FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the SYM DD50 or the Peugeot Speedfight?

The SYM DD50 passes its MOT first time more often than the Peugeot Speedfight: 73.3% vs 65.2%, a 8.1-point lead. Adjusted for age, mileage and test class, the SYM DD50 still comes out ahead: +1.1 points vs comparable bikes for the SYM DD50, -5.3 for the Peugeot Speedfight. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the SYM DD50 fail its MOT on most?

Brakes: 10.6% of SYM DD50 MOT tests failed on it, then lights & signalling (8.1%).

What does the Peugeot Speedfight fail its MOT on most?

Lights & signalling: 15.4% of Peugeot Speedfight MOT tests failed on it, then steering & suspension (12.9%).

Which holds up better at high mileage, the SYM DD50 or the Peugeot Speedfight?

At 30k-40k miles the SYM DD50 passes first time more often: 62.0% for the SYM DD50 vs 56.6% for the Peugeot Speedfight.

SYM DD50 73.3% pass · 5,940 tests PEUGEOT SPEEDFIGHT 65.2% pass · 83.7k tests

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