This is a truly rare bike: a 1984 MHR color scheme Ducati Pantah 650. By the way MHR = Mike Hailwood Replica (see chap below):
The Pantah is an important version in Ducati’s history as it represent the ancestor of the commonly know Ducati L2 motors with the cams driven by belt. The upgraded 650 engine (up to 1983 it was 600cc) was needed for the homologation of the TT racer with which it shared the motor’s 61.5 mm stroke.
For more click HERE