Fastest ive been is 186 MPH on a built liter bike (Repsol CBR).
As far as my GN not sure but I would say north of 150 back in the day when I used to lock the TCC at WOT. I got into a tangle with a AMG Mercedes and with a 28 inch tire and convertor locked I was near 5000 RPM... we were flat moving.
The speed where you have the vibration waves going ...wooom wooom wooom wooom
I remember the look on his faced when I caught him in at the top of third and passed and started slowly pulling away

he thought I had nitrous. This was on a looong straight stretch of road in Fl.
Had my Nissan R32 about 145 when I lived in Japan racing a 2nd gen Supra, he had missed 2nd gear on a dig race and then rolled along side and we went from 50.....he lost again.
My dad had a 21 Bumble Bee bass boat several years back with a Yamaha 225 low water pickup racing lower unit, jackplate and it would do 82 MPH.
I dont care for the fast boat stuff so much as I have been in a high speed porpoising event and that scared the living #$%! outta me. One of the few times I really really thought this is it..... im dead. God miracled us outta that!!
Fastest 1/4 mile I have been in was a friends AWD Sonoma (4 ET streets) with a big SBC and a two stage nitrous setup all totaling well north of a 1000 HP. I was shotgun we made a pass and the second stage that day was a 350 shot which he sprayed on the 1-2 shift ...My vision tunneled and back cracked like at the chiroprator...what a rush!! That truck is wicked!!! Easy 8 second truck