SMITHTOWN - ? A motorcyclist is fighting for his life this morning after slamming into a tree in Suffolk County. Cops say Stephen Peragine was riding his Harley on Daly Road near Blacksmith Lane in East Northport around 1 p.m. yesterday when he lost control and hit a tree. The 54-year-old was taken by helicopter to Stony Brook University Medical Center and is listed in critical condition. The motorcycle has been impounded for a safety check.