NORTON CS1

490cc Petrol Class 2

96.3%

first-time pass rate

2.5%

failed outright

11,537

median miles at test

MOT tests, 2005–2025

What fails on a CS1

failure defects by component group · advisories excluded

Component group	Share of defects	Defects	% of defects
brakes		1	50
steering and suspension		1	50

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the CS1 beats 4 of its 4 closest rivals (KAWASAKI ZX-6R, SUZUKI GSF600, YAMAHA FZS600).

KAWASAKI ZX-6R 78.1% pass · 174k tests SUZUKI GSF600 77.3% pass · 143k tests YAMAHA FZS600 82.6% pass · 137k tests YAMAHA FZ6 85.2% pass · 67.1k 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 CS1.