I have a 1992 sp which i have just recently bought.... everything seems ok but i'v noticed the front brakes chattering when i brake, more noticeable at moderate speed than high speed. head bearings seem fine, yoke pinch bolts all tight etc.... cant see anything obvious... next thing i'm going to check is the brake caliper pistons then the disk to see if all the floaty bits are free and if they're warped.... Anybody have any other suggestions? thanks