Ajs Model 16 vs Yamaha RD350

The Ajs Model 16 passes its MOT first time more often than the Yamaha RD350: 93.0% vs 86.3%, a 6.7-point lead.

MOT reliability, side by side

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

Metric	Ajs Model 16	Yamaha RD350
First-time pass rate	93.0%	86.3%
Outright fail rate	2.2%	6.6%
Engine size	350cc	347cc
Rank among all models	#298 of 5428	#2120 of 5428
Median miles at test	14,092	23,256
MOT tests analysed	229	19,574
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.

Pass rate by mileage

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

Mileage	Ajs Model 16	Yamaha RD350
0k-10k miles	95.6%	88.9%
10k-20k miles	97.0%	87.5%
50k-60k miles	90.9%	83.0%

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

AJS MODEL 16 93.0% pass · 229 tests YAMAHA RD350 86.3% pass · 19.6k tests

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