I've been using RedX for over forty years and it's never given me any problems and has always kept my carbs/fuel systems good and needing less maintenance.
I've also used it for,"Liquid De-cokes" on the top-ends.People say modern fuel is cleaner and less carbon build up but it still builds up over time from what I have seen.
I might buy one of these cheap Borescopes for giggles to have a look at the crowns of my pistons,
https://www.ebay.co.uk/itm/7mm-6-LED....c100005.m1851