I thought it might be a Victor.
I had a buddy that would haul his 441 Victor to the various race tracks we would attend during the race season, Watkins Glen, Road Atlanta, Mid-America etc.
He took great joy in firing that very loud engine up very early in the morning after a hard night of beer consumption. Man that exhaust volume could destroy your hearing and the handle bar vibration would leave your hands tingling for days.
One morning the Victor kicked back and sent him sailing along with trashing his knee.
He received ZERO sympathy from his hung over comrades.