In my case it has levelled the link and I have it had the slugs in for 12k miles. I have not had a whiff of a tank slapper, even with the nz roads full of potholes. I careful to make sure the link was not pointing downward. There is a thread discussing this here somewhere.I'm not sure that I have understood correctly when people write about putting slugs into the spring housing to pack them up. If I have the correct understanding of that then please be careful, We all did it for years to either compensate for weak springs or to try to mimic the 'D' use of longer, softer springs. If you have done that then please look at the angle of the lower link. Is it pointing downwards at the front? If so then when you put the brake on the bike will try to rise up over the front wheel and the suspension locks up. It can also lead to tank slappers. That was the reason that John Emanuel over here and Dave Dunfey in the USA developed the modified front suspension. Dave Dunfey's first attempt at a cure was to fit shorter, stiffer springs. Just be careful.