SYM DD50

49cc Petrol Class 1

#4469 of 5426 overall #49 of 78 SYMs #171 of 455 moped bikes

73.3%

first-time pass rate

18.8%

failed outright

9,008

median miles at test

5,940

MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2023

The DD50's first-time pass rate has fallen 3.5 points since 2005, 81.3% to 77.8%.

Pass rate by mileage

how the DD50's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage DD50 passes first time 77.7% of the time; by 30k that's 62.0%.

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 DD50

failure defects by component group · advisories excluded

Component group	Defects	% of defects	vs all bikes
brakes	950	35.6	2.5×
lighting and signalling	751	28.2	1.9×
steering and suspension	340	12.7	1.5×
tyres and wheels	250	9.4	1.9×
fuel and exhaust	183	6.9	3.4×
lamps and reflectors	67	2.5	0.4×
reg plates and vin	58	2.2	1.6×
body and structure	35	1.3	1.1×
suspension	17	0.6	0.3×
tyres	16	0.6	0.4×

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 DD50 beats 4 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 DD50.

Pass rate by registration year

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

Best year to buy used: 2010 (78.3% pass). Weakest: 2011 (68.6%).

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.

SYM DD50 FAQ

answers computed from the data above · terms in the glossary

Is the SYM DD50 reliable?

The SYM DD50 is about average for its class: 73.3% of its 5,940 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #4469 of 5426 models.

What does a DD50 fail its MOT on most?

brakes — 36% of all defects recorded against failed DD50 tests.

What is the best year of DD50 to buy used?

By first-time pass rate, 2010-registered examples do best (78.3%) and 2011 worst (68.6%). Condition and history still trump the year.

How many miles will a DD50 last?

The median DD50 shows 9,008 miles at test, and examples around 30k miles still pass 62.0% of the time — mileage alone rarely kills one.