Half a Vincent vee-twin with nasty Burman gearbox and many common chassis parts to the 1000. A rather weird old thing, but a bit smoother than you’d expect and some of the Vincent quality shines through. At least it doesn’t fall apart as you bounce up the road. Not really up to modern road speeds but tougher than the other 500 singles. Also earlier Meteor and racing Grey Flash versions.
1948-54, 499cc OHV single 28hp, 90mph, 60mpg, 400lbs