When the Mk. 4 hit the track in 1971 it was hailed as Bultaco’s best looking dirt bike. From the start, the Pursang was an extremely serious motocross competitor. This was due to its long wheelbase, fork angle and low center of gravity. The engine was blessed with usable torque and strong top end power.
The Mk. 4 was sold in two versions, a scrambles model with a 19” front wheel, universal tires, and clip on handlebars, and a motocross model with a 21” front wheel, knobby tires, and cross braced MX style handlebar. This example is the motocross model.