05-05-2014, 04:43 PM
(05-05-2014, 01:48 PM)Dave_imp Wrote: Hi Ferret, there's a lot of great stuff here, thanks! My 1976 CB750F (still own it) head shakes at exactly 47 mph on deceleration if you take your hands off the handlebars. (At least it did 10 years ago, the last time I rode it). I'm sure the front wheel was never balanced properly, and the steering head bearings are probably worn also. The races on my 1998 VFR steering head bearings wore out and I replaced them (little indentations caused by the balls in both the upper and lower), but this bike never shook the handlebars.
My '93 CB750 has acquired this problem as it has aged (as have many of my older bikes). I've done the tires (speed balanced), fork oil and seals and I'm looking at the steering head bearings now. One thing I've been told is that the steering head nut can get loose over time. I'm going to loosen and retorque it before springing for new new bearings.
HondaJon, deceleration shifts the bike's weight forward and all of that stress goes to the steering head. If you're feeling that shake in the CB1100, I'd suggest retorquing the steering head to spec. I have run across more than a few fasteners that were not torqued properly at the factory. My CB11 shows no hint of a shake.