after an 10 month lay up i started my 550 and ran for about 5 minutes, drained the engine oil, which looked like mayonnaise
bike will have been put away on fresh oil and i don't remember any water in the old oil when i changed it before i put it away
i had previously suspected that a head gasket had failed due to the bike pushing some coolant out when running hard
the head gaskets show no obvious signs of failure, (standard size) base o-rings look good
engine number is 04758 and has black sealant
i have measured the liner height and they are exactly flush with the casings, the thinnest feeler gauge i have is 0.0015" and i can't get it in anywhere under a good steel rule
heads were lapped on a granite block last time they were off, no sealant used
does a head gasket seem like the obvious choice of failure or should i think about re-sealing the cases?
i have read previously about amauri using shims? amauri, or cal are these available (i'm in uk)
i think flush liners are within spec, but a couple of thou above is preferred?
bike is track only, run mainly on large tracks at full throttle a lot, last use was two days on a very hot track day (about 35° - 40+°c) if memory serves i put new pistons in it before that event so its probably done about 4-5 hard hours
thanks in advance, any help appreciated