BIKERELIABILITY
MOT DATA · GREAT BRITAIN · 2005–2025
Model report · 2005–2025

GILERA DNA

49cc Petrol Class 1
64.8%
first-time pass rate
27.3%
failed outright
7,362
median miles at test
19.3k
MOT tests, 2005–2025

Pass rate over time

first-time pass rate by test year · 2005–2025

The DNA's first-time pass rate has risen 3.5 points since 2005, 69.3% to 72.8%.

58%67%76%2005: 69.3% pass (404 tests)2006: 70.8% pass (2,256 tests)2007: 66.9% pass (2,170 tests)2008: 64.8% pass (1,998 tests)2009: 63.7% pass (1,986 tests)2010: 60.9% pass (1,868 tests)2011: 61.8% pass (1,774 tests)2012: 62.1% pass (1,497 tests)2013: 62.5% pass (1,181 tests)2014: 61.1% pass (1,009 tests)2015: 60.9% pass (724 tests)2016: 65.4% pass (578 tests)2017: 68.0% pass (403 tests)2018: 64.8% pass (227 tests)2019: 70.6% pass (197 tests)2020: 67.3% pass (202 tests)2021: 67.6% pass (219 tests)2022: 71.4% pass (182 tests)2023: 69.9% pass (183 tests)2024: 72.6% pass (113 tests)2025: 72.8% pass (125 tests)20052025

Pass rate by mileage

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

A low-mileage DNA passes first time 68.3% of the time; by 30k that's 63.1%.

58%64%70%0k: 68.3% pass (12,138 tests)10k: 59.7% pass (5,301 tests)20k: 62.0% pass (631 tests)30k: 63.1% pass (84 tests)0k20k30k

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 DNA

failure defects by component group · advisories excluded
Component group Share of defects Defects % of defects vs all bikes
lighting and signalling
5,397 33.2 4.0×
steering and suspension
4,493 27.6 4.7×
brakes
2,486 15.3 2.1×
body and structure
1,092 6.7 8.8×
tyres and wheels
1,023 6.3 2.3×
fuel and exhaust
767 4.7 4.7×
lamps and reflectors
327 2 0.6×
reg plates and vin
326 2 2.5×
suspension
198 1.2 1.0×
structure and attachments
164 1 0.8×

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

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 DNA.

Pass rate by registration year

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

Best year to buy used: 2008 (70.6% pass). Weakest: 2000 (57.8%).

55%64%73%2000: 57.8% pass (685 tests)2001: 63.4% pass (4,771 tests)2002: 63.7% pass (4,727 tests)2003: 66.0% pass (4,337 tests)2004: 66.4% pass (1,939 tests)2005: 66.4% pass (1,085 tests)2006: 68.4% pass (757 tests)2007: 66.0% pass (412 tests)2008: 70.6% pass (436 tests)2009: 63.5% pass (96 tests)200020052009

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.

GILERA DNA FAQ

answers computed from the data above · terms in the glossary

Is the GILERA DNA reliable?

The GILERA DNA is less reliable than average for its class: 64.8% of its 19,296 MOT tests (2005–2025) passed first time, against a class average of 73.4%. That ranks it #5024 of 5426 models.

What does a DNA fail its MOT on most?

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

What is the best year of DNA to buy used?

By first-time pass rate, 2008-registered examples do best (70.6%) and 2000 worst (57.8%). Condition and history still trump the year.

How many miles will a DNA last?

The median DNA shows 7,362 miles at test, and examples around 30k miles still pass 63.1% of the time — mileage alone rarely kills one.