hi, been working on yoda (my green 899cc sx) for a couple of months now getting it ready, the only prob its had is a very slight intermitant miss fire (only once in a while) today i ran it up for 25 mins today and when i turned it off i decided to check the oil etc, took the filler cap off and found a little cream gunk in it, then i noticed the breather pipe has collapsed and there is a bit of gunk in that to. so first thought was head gasket. howether the oil in the sump is fine, no signs of gunk. it does not "pressure up" at all, or over heat. fan works etc, just the gunk in the cap and breather. could it be caused by condensation because of the collapsed breather? or is there anything else it could be? the oil in the cap has been fine up til now but today was pretty much the longest its been run since i got it. any help much apreciated