Skip - check out the BG product line - something for everything.
https://www.bgprod.com/catalog/engine/bg-rf-7-oil-treatment/#:~:text=BG%20RF%2D7%20is%20an,compression%20and%2 0reduce%20blow%2Dby.
...also I would stop in my local Harley shop and bounce the question off one of the techs.
They all have their favorites.
Bill K
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73 911T MFI, 76 912E, 77 Turbo Carrera
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