Huge thumper in custom guise, with belt drive, that produces excess of low end torque but gasps at the upper end of the range. Performance is helped by the relative lack of mass, worth looking at for someone who wants a custom without the usual 500lbs plus of metal. Piston, cam and gearbox eventually give trouble. Also Jap market, 25hp 400cc version.
1987 on, 650cc OHC single, 40hp, 95mph, 60mpg, 360lb