breaking in an engine

[knuckleduster13]

I recently had the pistons and rings of my cb77 replaced to the next oversize.
I changed the oil after the first 80km so far
ive ridden it for another 300 km.
Please enlighten me on a good break-in procedure
i noticed white smoke from my exhaust the exhaust,
it was lessened aafter the first oil change,
i Still seem to have some faint white smoke emanating from my left exhaust pipe
any tips would help
cheers
dante from manila