Harris Magnum vs Suzuki GSF1200

The Harris Magnum passes its MOT first time more often than the Suzuki GSF1200: 87.1% vs 82.4%, a 4.7-point lead.

MOT reliability, side by side

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

Metric	Harris Magnum	Suzuki GSF1200
First-time pass rate	87.1%	82.4%
Outright fail rate	5.8%	8.9%
Vs comparable bikes (age & mileage adjusted)	+2.3 pts	-1.2 pts
Engine size	1,075cc	1,157cc
Median miles at test	21,819	20,274
MOT tests analysed	139	97,637
Most common failure	lighting and signalling	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.

Pass rate by mileage

first-time MOT pass rate by miles on the clock at test

Mileage	Harris Magnum	Suzuki GSF1200
0k-10k miles	90.2%	87.7%
50k-60k miles	90.6%	78.8%

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

HARRIS MAGNUM 87.1% pass · 139 tests SUZUKI GSF1200 82.4% pass · 97.6k tests

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