Shifty
the old girl a bit unsteady on her feet..???
first things to check -
steering head bearings oK?..not too loose or tight
front wheel bearings ok?..no slop
front wheel axle tight...?
no leaks from the fork seals?
rear swing arm not sloppy, bearings not stuffed?
rear wheel aligned in swing arm?
rear wheel tight?
chain ok and tensioned correctly?
rear unitrak suspension links ok and lubed up?
rear shock not loose ..?
all ok? yep! so next
lets get new oil in the forks
why? see my post here....
http://www.ksrc-au.com/phpBB2/viewtopic.php?t=2750
that black crap called used fork oil is not gunna help
so I suggest you get some new fork oil ..try a slightly heavier oil
than recommended say 10w (std is 5w) and try it.
think you will find the front improves
next....
the rear suspension!
if the swing arm is ok and the unitrak links ok
you are left with the rear shock absorber
they are an air/gas unit..that either work or don't
and if they don't work, you have basically no suspension on the rear of the
bike..it will be rock hard (sound familiar?)
and
there is one simple test for the unit
get out the pushbike pump and pump the unit up to 15psi
(connector is on the rh side of the bike and comes out thru the frame)
then set the shocker to max stiffness..
pull out the adjuster link as far as it will go, then sit on the bike and bounce up and down
bike rock hard?? shock is stuffed and you need a new one
bike bounces? shock is ok but make sure you keep air in it
It is likely that due to age the shock is stuffed
and the OE Kwaka unit is not the best, an Ohlins shock with spring is better
but will cost you.
You may need a manual to do or check out some of the above
think you will find 2ndhand manuals on eBay pretty cheap
and of course an amount of mechanical knowledge
If you don't wanna do the dirty work, hand it to a workshop to do
(there are some safety issues with some of the above, better
to be safe than sorry)
hth
cheers