Quick Stats

1982-84 744cc (76x82mm) OHV twin 55hp, 120mph, 45mpg, 420lbs

What to Expect

The T140 engine got a new eight valve head, somewhat less than inspired styling and a little bit more performance. Unfortunately, it’s hard to cool four valve per cylinder designs and reliability can suffer accordingly – we know one guy who converted the engine back to the old cylinder head design! Good ones, run on freer-flowing carbs and exhaust, do go rather well, with a touch less vibration than stock Bonnies.