Silly ram-air cylinder head. Engine mild enough to ensure that every motor was tuned until the small-ends rattled, pistons holed. Chassis wobbles, usually due to naff swinging arm bearings, added to the chaos. Many dead meat in less than 20k but the odd one has done more than 50k. Avoid anything with clip-ons and spannies unless inured to mass laughter and thrown bricks.
1973-79, 247cc t/s twin, 27hp, 85mph, 60mpg, 320lbs