All I can contribute is: *MY* ‘98 Magna Deluxe, debaffled, ran 13.02sec @ 104mph in the 1/4-mile at a sanctioned track, just a few years back. Also, *MY* ‘86 VMax, with Kerker and jet kit, ran 10.96sec @ 124mph at this same track back around ‘91 or so. Further readings on these and others I’ve had at the strip can be found here:
https://v4musclebike.com/forums/show...Guesses&page=2
As to top speed on the Gen1 VMax - for me, 130 is PLENTY fast on that thing!!! Anything above that, somebody else needs to ride it. But, boy, is it fun getting to 130!!