there was a thread on this and a good youtube video link
on a cruiser bike (all our Vstar bikes) you cannot get the bike to lean even 45° from vertical
there is a lot of physics involved, but that means the bike will not slide out on you
so you can be confident and lean it all the way till it scrapes, and even on wet pavement the tires will stay hooked up and not slip out
once the floorboards hit you do have to back off, because the next thing will be the frame, and that will make the bike side out.
Also when the floorboards start to scrape you can stop it and stand the bike up a bit by shifting your weight to the inside of the turn.
Ive never scraped either of my bikes - the roads where I live normally you cannot see all the way thru the curves - so if you are going fast enough to scrape you are riding well beyond your ability to stop or avoid something ahead that you cannot yet see.
Edit: If you want to play around with scraping the floorboards at lower speeds, instead of leaning your body weight to the inside of the curve, lean to the outside - that will make the bike lean in even more, you will be going slower, and you can lean in to stop the scrape if you freak out.
Last edited by KCW; 08-06-2019 at 12:45 PM.