no idea who did it,i bought bike after rebore-but was told mechanic was best around+did thorough job-seems to be true,done 800k,s on it now+not using any oil.so supose its run in now!guy who sold it was very fair+let me test bike for 2 days-in which time i did roughly wot uve said.only bad thing is heat seems to go up after 200k-which i,d put down to luggage i,m carryin+me!its only small!