I have a 2005 fxdi with progressive spring and 10 weight bel ray fork oil. forks just seem to soft anybody run 15 weight or heavier oil? thanks in advance

 

I'd adjust preload before heavier oil.change you spacer adding a 1/4" at a time . Should get better and the dampening can still work. Heavier oil will slow the compression and rebound and make things harsh. Or burley preload adjusters. ...

 

I did the drop in lowering kit with Amsoil 10 weight oil and mine is super soft. Talked to the guys at burly and they suggested using the preload adjusters. So that will be my next move

 

i run caltex 15w in my 2006 wide glide, no brake dive , with no other mods to front end at all