TRIUMPH TT600 vs YAMAHA FZS600

The YAMAHA FZS600 passes its MOT first time more often than the TRIUMPH TT600 — 82.6% vs 79.9%, a 2.7-point lead.

MOT reliability, side by side

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

Metric	TRIUMPH TT600	YAMAHA FZS600
First-time pass rate	79.9%	82.6%
Outright fail rate	12.5%	10.6%
Median miles at test	15,568	21,612
MOT tests analysed	15,432	136,558
Most common failure	lighting and signalling	brakes

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.

TRIUMPH TT600 79.9% pass · 15.4k tests YAMAHA FZS600 82.6% pass · 137k tests

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