Velocette Viper 350 vs Suzuki DR-Z400S

The Velocette Viper 350 passes its MOT first time more often than the Suzuki DR-Z400S — 94.1% vs 80.4%, a 13.7-point lead.

MOT reliability, side by side

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

Metric	Velocette Viper 350	Suzuki DR-Z400S
First-time pass rate	94.1%	80.4%
Outright fail rate	2.0%	11.1%
Median miles at test	7,245	6,940
MOT tests analysed	102	26,773
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.

VELOCETTE VIPER 350 94.1% pass · 102 tests SUZUKI DR-Z400S 80.4% pass · 26.8k tests

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