A man riding a bike hit a truck in Kalamazoo yesterday and is now in critical condition.  The 59-year-old was riding his bike on South Westnedge at around 3:30 when the truck ahead of him made a turn on to Maple and the two hit.  The rider was thrown from the bike and suffered head injuries, he was taken to Bronson in critical condition.  Police want to talk with anyone who witnessed the crash.