Restorer Bob Rymer brought along his clean '75 T160, thoughtfully modified with freer-breathing reverse-mega silencers, an earlier airbox and a triple-carb setup. Flood the two outside Amals, thumb the electric starter and the vintage triple growls to life, copious valve clatter almost overpowering the exhaust note. Though the exhaust sounds silky enough, as the revs build so does vibration, and before long the entire machine is dancing like a 53-bhp vibrator. Footpegs, seat and handlebars are alive as we accelerate through the stiff gearbox action. Yet the engine does prove nicely perky, stretching into a high-rpm power peak with satisfying urgency, while the ripping exhaust note merges with an intriguing airbox for an enjoyable overall sound. It was good enough for the T150 to dish out a 12.7-second E.T. at 106 mph back in the day.