I, on the other hand, have been surprised at just how much of a difference half a turn on the damping screw makes.
You obviously had a good one.
After a lot of tinkering with the standard units on my 07Adv (15months old and 10,000miles), I eventually took the often repeated advice of the group that I ride with and made an appointment with Darren at MCT in Stowmarket.
He reckoned that the front unit on my bike is fine, but to balance the front-to-back, he set it at one click up from standard.
However, the rear unit was barely functioning. It was under-spung even for my boyish 16 stone - demonstrated by the sag (the bike not me). There was no compression damping to speak of - demonstrated by applying weight to the back of the bike - it just rode down on the spring. The rebound damping adjustment all happened in the last 3/4 of a turn to fully in - up to that point the adjuster made absolutely no difference at all - demonstrated by tweaking and bouncing, it was very noticeable
. So basically, on near-standard settings I was just bouncing along on the spring with absolutely no compression and negligible rebound damping. The back was squatting when powering out of corners and making the bike run wide etc etc.
He set the bike up as best he could by winding the rebound up to almost full whack and the rebound damping to 1/2 a turn out from fully in. The bike handled much, much better on smooth roads (a real eye-opener) but in the wet and on bumpy roads it was pretty skittish at the back because it was set up so stiff. Nevertheless £80 well spent.
Darren said that he sees loads of GSs. He reckons the quality of the rear units in particular varies wildly due to very poor quality control - for example, the rebound damping adjustment should be linear from one end of the adjustment to the other - it isn't because of budget-level machining and minimal quality control. It is also amazing that they are so under-sprung - for a bike that is designed to be loaded up
. Basically they are low budget units.
Anyway, I ended up ordering an Ohlins unit (£
), which they had sprung for my particular usage riding style/weight/passenger/luggage etc, then he set the bike up for me and gave me a list of settings for various loads/conditions.
I am absolutely amazed at the bike's handling now, it is totally transformed. In my opinion it's absolutely the best value in terms of fettling that you can have - forget the Akrapovic until you've sorted the suspension - better to be rapid than just sound it
(The standard unit goes back on when I sell it!
)