Ajs Tempest Roadster vs Gilera Runner

The Ajs Tempest Roadster passes its MOT first time more often than the Gilera Runner: 72.2% vs 70.8%, a 1.4-point lead.

MOT reliability, side by side

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

Metric	Ajs Tempest Roadster	Gilera Runner
First-time pass rate	72.2%	70.8%
Outright fail rate	18.3%	21.5%
Vs comparable bikes (age & mileage adjusted)	-4.1 pts	-0.7 pts
Engine size	124cc	124cc
Rank among all models	#4568 of 5428	#4675 of 5428
Median miles at test	3,790	11,381
MOT tests analysed	558	69,850
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	Ajs Tempest Roadster	Gilera Runner
Lights & signalling	9.3%	12.3%
Brakes	10.4%	7.2%
Steering & suspension	5.4%	10.6%
Structure & body	4.1%	2.0%
Tyres & wheels	0.2%	5.1%
Fuel & exhaust	0%	2.6%

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	Ajs Tempest Roadster	Gilera Runner
2021	86.0%	79.1%
2022	72.4%	80.5%
2023	65.6%	81.3%
2024	68.4%	84.0%
2025	74.8%	85.5%

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	Ajs Tempest Roadster	Gilera Runner
0k-10k miles	75.1%	76.2%
10k-20k miles	59.7%	67.5%

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

Ajs Tempest Roadster vs Gilera Runner FAQ

answers computed from the data above · terms in the glossary

Which is more reliable, the Ajs Tempest Roadster or the Gilera Runner?

The Ajs Tempest Roadster passes its MOT first time more often than the Gilera Runner: 72.2% vs 70.8%, a 1.4-point lead. Adjusted for age, mileage and test class, the Gilera Runner still comes out ahead: -4.1 points vs comparable bikes for the Ajs Tempest Roadster, -0.7 for the Gilera Runner. An MOT checks roadworthiness items, not engine or gearbox internals.

What does the Ajs Tempest Roadster fail its MOT on most?

Brakes: 10.4% of Ajs Tempest Roadster MOT tests failed on it, then lights & signalling (9.3%).

What does the Gilera Runner fail its MOT on most?

Lights & signalling: 12.3% of Gilera Runner MOT tests failed on it, then steering & suspension (10.6%).

AJS TEMPEST ROADSTER 72.2% pass · 558 tests GILERA RUNNER 70.8% pass · 69.9k tests

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