slowly

Husaberg 650 2007. I noticed that the spring of the rear shock vibrates when it compresses and extends slowly (for example, when I move the motorcycle while sitting on it. And the shock makes a strange squeaky noise. Is this normal?

Bike is a 650 with a dellorto carb. It runs good othertwise, but if you rev it, it stays on 3000rpm for a while, then drops to normal idle of 2000rpm. Jetting: some drilled main jet (just under 2mm), needle clip pos. 3, needle K51, DR272, pilot jet 40, and air screw 1.5 turns out. I tried to...

Hi guys any advice. On my 1999fee berg when I shut the throttle (round slide dellorto) the revs take a while to slow down. This is a new problem. The idle is good when it gets there. The valves are adjusted right. I know idle can change which is a sign of tight valves, but this is perfect...