Lambretta Jet vs Piaggio X9

The Lambretta Jet passes its MOT first time more often than the Piaggio X9: 87.9% vs 77.0%, a 10.9-point lead.

MOT reliability, side by side

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

Metric	Lambretta Jet	Piaggio X9
First-time pass rate	87.9%	77.0%
Outright fail rate	6.0%	17.5%
Vs comparable bikes (age & mileage adjusted)	+5.3 pts	-4.4 pts
Engine size	198cc	244cc
Rank among all models	#1639 of 5428	#4065 of 5428
Median miles at test	4,965	12,186
MOT tests analysed	487	21,703
Most common failure	lighting and signalling	steering and suspension

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.

Pass rate by test year

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

Test year	Lambretta Jet	Piaggio X9
2010	91.4%	75.1%
2011	94.7%	75.7%
2012	93.5%	74.8%
2013	95.0%	74.1%
2014	85.7%	75.5%
2015	92.3%	76.1%
2016	84.6%	76.3%
2017	84.2%	76.3%

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	Lambretta Jet	Piaggio X9
0k-10k miles	87.7%	81.4%
10k-20k miles	92.0%	75.8%
20k-30k miles	86.8%	72.4%

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

LAMBRETTA JET 87.9% pass · 487 tests PIAGGIO X9 77.0% pass · 21.7k tests

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