Idiosyncratic thumpers with vintage chassis but performs better than most sixties rivals, handles well. The 350 has less vibes, a better balanced feel, but more 500’s on the market. 500 Thruxton popular with collectors but too brutal for serious road riding. MSS and MAC cooking singles which are still useful for mild riding. Spares expensive.
1956-70 350/499cc OHV single 22/29hp, 80/90mph, 65/60mpg, 400lbs