hi biker friends. after I have removed my zzr 1100 C motor he is now standing handlch on a trolley. I have taken down the 4-in-1 and now have a small view of the valve shaft of all 4. I see the valve 1, 2 and 4 are totally white and valve 3 is black rust. do I have a bigger problem to expect???? before the expansion run the motor silky soft,… no signs for any disturbances. since I am not a mechanic I don’t want to be a layman and Maybe you have an idea what it can be or that you have to do something when the engine is at least back in and I can drive to my factory. thank you for your answer. greetings whvprint