fs450 2008 compression pressure

Checked the service manual? If you need a copy, try here: Service Manuals - Husaberg Forum

or here: https://drive.google.com/folderview?id=0B_X2MDkeGC0hNDRubmdrOEV2Rms&usp=sharing

Yeah, sorry for the red herring, I just checked the manual and there's nothing there that I can see.

There are some older threads: https://www.google.com/search?&q=compression test psi site:husaberg.org

Kind of tricky to get a "true" compression test it seems? 100-150-175psi seems to be the range, depending.

So an absolute compression reading is pretty tricky to get. (Does a cold engine give a meaningful measurement? Does the decompressor allow meaningful compression tests?)

It would have been best to have taken compression readings when the bike was known-good (Hard to go into the past, unfortunately I need to do this for my bikes!) Then if the compression starts going down in subsequent tests, you can deduce that something is wearing.

What reading do you get, and how are you testing?

For a meaningless comparison, I know that a DR-Z400 should get 950kPa / 9.5 kgf/cm² 135 psi - with an on-cam automatic decompressor working and bleeding off compression. The E type is 12.2:1 static compression and has a decently wide rev range so dynamic compression shouldn't be miles away from a 'Berg.

However! A leakdown test might tell something more concrete.

Or have a look down the cylinder and replace rings just to be sure? Do a compression test before and after?