HI guy im new to this forum , but i hoping someone might be able to help. I have just put a takegawa 110 big bore kit into my old 90 , still running a stanard head and a 26mm mikuni carby . The issue im having is im getting a small amount of oil in the intake , it seems to by some sort of blow by . Ive pulled it down twice and inspected everything and i could find anything that could be causeing this issuse. Sorry i forgot to mention that im running a honda 106 piston , which is the same ( 52mm ) , i run a semi synthetic and im thinking of changing it to a mineral oil and see how it goes . Has any one else came across a similer thing.