rear left shock pre-load knob not working?

[KiwiCol]

I've still got std shocks, but I recall some of the guys fitting Hagon Nitros' (not sure of the spelling) Basically the more money you've got for a new set of shocks the better handling & ride you'll end up with. I know from reading, they're not an inexpensive item for sure.

[KiwiCol]

Have a look at this section, might give you some tips

http://gsx1400owners.org/forum_test/index.php?topic=1031.0