The Yamaha shop that sold me the Busa replaced the fork seals before delivery and botched the job! I only ended up with 8 and 10 clicks of rebound damping on the top of the legs. Failed to correctly set the lockout on the center rod? Failed to back out the adjuster screw fully before putting the end caps on? I took it to a local-ish Suzuki dealer and the service manager went and got the head mechanic to come and look at it. I told him something was definitely going on in there because it just didn't ride right, I said I wanted it pulled apart and setup right and while he was at it replace the springs with some rated for me weight (our weight as it turned out, 100kg)
I asked what he thought of the springs and he checked the preload, which was out 4 rings and then sat on it. "Perfect he said, these springs are fine". Both the front and back sagging together an equal amount and not much dive when you throw your weight forward. So I saved a couple of hundred there... Then he got out a screwdriver and tweaked the compression and rebound on the front and said try that on the way home. He had adjusted them a bit off to suit what was happening inside I think, but it rode like it was on on rails all the way home. Amazing! Much confidence I have now, I'll get him to go over the whole bike and just check it out for me, something he as an older mechanic would be better at than my haphazard inspection. It can be hard to find a serious mechanic these days.
I asked what he thought of the springs and he checked the preload, which was out 4 rings and then sat on it. "Perfect he said, these springs are fine". Both the front and back sagging together an equal amount and not much dive when you throw your weight forward. So I saved a couple of hundred there... Then he got out a screwdriver and tweaked the compression and rebound on the front and said try that on the way home. He had adjusted them a bit off to suit what was happening inside I think, but it rode like it was on on rails all the way home. Amazing! Much confidence I have now, I'll get him to go over the whole bike and just check it out for me, something he as an older mechanic would be better at than my haphazard inspection. It can be hard to find a serious mechanic these days.