fzs 600 strange back end behaviour

[Hahadumball]

98 fzs...

the rear end feels like i have a flat tyre when cornering, feels fine when im going straight and once i get over the initial flat tyre feeling and lean more its fine however at high speed it does have a little wobble.

wheels ballanced
bearings are new and no wear on the hub
sprocket and chain all good condition
chain is straight and not kinked/dry/derp
swingarm fine

it seems to happen a lot more when i lean left and barely does it on right corners...

the tyre "looks" okay but is it possible for it to cause this? theres no obvious buldges or anything on it.
____________________
Fin: no matter how much I look at It I can't understand what was going through my head, all I remember is going about 80 and redlining it to stop it seizing.
360 Deg... Five 1/4 turns. :- Teflon-Mike 18 Jan 2015

[Robby]

Any chance it also feels like you're about to die when you go over white lines?

Check the head bearings. Put it on the centre stand, get jack under the engine to get the front wheel off the ground, and gentle move the bars lock to lock. Feel for a click or a clunk as the wheel points dead ahead.

If they're totally fucked, like on one of my old bikes, you'll find it moves quite nicely within a few degrees of straight on - that means the bearings haven't just worn a groove, but have worn a deep smooth divot to settle in to.

[Hahadumball]

head bearings are slightly notchy i did intend on changing soon but its only on the back, it feels as if the back tyre is flat
____________________
Fin: no matter how much I look at It I can't understand what was going through my head, all I remember is going about 80 and redlining it to stop it seizing.
360 Deg... Five 1/4 turns. :- Teflon-Mike 18 Jan 2015

[pepperami]

Not squared off is it? or old and hard?
____________________
I am the sum total of my own existence, what went before makes me who I am now!

[STONEY!]

Checked swingarm bearings? Had a lot of fazers with failed arm bearings.

[Busa1340R]

[Robby]

Often a problem that feels like it's happening at one end is actually at the other end - so knackered headstock bearings can make the back tyre feel like it isn't working, and knackered swingarm bearings can make the front feel funny.

You know the headstock bearings need doing, so sort them out before hunting for more problems. If the bike is generally a bit worn, I would also strip and clean the rear suspension linkage and the swingarm bearings. New grease makes a big difference, I recently did the rear suspension linkage on my VFR. The bearings were in good condition and still had some grease it, but over the years it had turned into something more like dirty water. They absorbed a surprising amount of new grease.

[andym]

I've found the back end on my bikes have been a bit twitchy on corners when the pressure is low (or squared off tyres)

[Kawasaki Jimbo]