Honda-SOHC

hello from the bronx, everybody. i commute daily on my stock 1978 cb750f supersport. i bought it spur of the moment when i spied it in a friends garage. he had just "drank the  cool ade" and bought a new h.d softtail custom, and was looking to sell his "starter bike".  the "f" was garaged and impecably maintained for all of its 32 years, and had 8700 original miles. i rode it home, title in hand, for $800. i bought new tires and changed the oil, and so far have put 300 trouble-free miles on her. one problem i've since noticed is that the bike is "crabbing" {if i drive through a puddle i leave 2 tire tracks, and the front end don't aim exactly straight ahead when i'm going down the road}. so that's my inspiration for joining this forum: i need help, and who better to educate me?
i also own a 1985 yamaha vmax, a 1989 yamaha vmax, an american bulldog, and an american pit-bull terrier.