Hi all. When I first bought my bike I thought I might have made an error of judgement on the style of bike for long rides as with the oem shocks and a back problem I was getting hammered.
Rather than having to buy a bike for practical reasons but with no real style, I decided to gamble on buying expensive shocks with Corbin and backrest.
For me it was the best decision I could have made. Mind you, hagon not having the spring ratings properly matched to a rider's weight caused me some physical and emotional grief for a couple of years. Eventually though, me and a few other blokes on here got hagon to change their specs so they would send the right springs to match varying rider weights.
Anyway, yes I regularly adjust my pre-load depending on two main factors. If riding with extra weight over my rear wheel which occurs mainly when i travel with luggage, given the weight I travel with is the roughly 50 to 60 kgs, I generally will need to rotate the collar that compresses the spring two revolutions downmTo get me that perfect pre-load setting.
The other factor I've noticed more recently is how hot or cold weather effects my preload. Without talking to anyone it's my opinion with the oil viscosity changes with temperature, which in turn varies a shock's ability to move about as freely or not due to the oil's thickness. I've only based this conclusion on looking at my shock's construction so bag me out if you want I don't really care. What's important for me is to find that sweet spot as I ride and when I say sweet spot I mean, more times than not my bum stays firmly planted on the seat and not being bounced off it. So with the viscosity thing I've only found a difference of one revolution between summer (hot days) and winter (cold days) though whilst This one revolution whilst it may sound a bit pedantic, it's enough for me to adjust my nitros given it's a simple process anyway.
Btw, fwiw I've read a fair bit about sag and whatnot but after a while of persistently searching for the comfort I paid good money to find, the best indicator to work out whether your shocks are dialed in correctly or even any good, is whether your backside stays nicely planted on your seat. The rest is experimenting either compressing or alternatively de-compressing the springs to work where you are in the spectrum.
That's my experience anyway.
Stacka