Early Star was slow and uninspired. Spitfire had 55hp, double vision vibes, self destruct gearbox, cranks and valves. Lightning was tougher and milder. New frame, suspension and brakes from 1970 on, coincided with variable build quality! Single carb Thunderbolt’s best buy, good compromise between power, reliability and economy. SRM crank upgrades good news. Lots of Yank imports. Some nice looking but fragile bikes in dealers.
1962-72 654cc OHV twin 38/55hp, 100/120mph, 45/60mpg, 420lbs