You buy the bike new? Do the engine numbers match up with the bike as original stock?
Looks like stock part numbers from a wreckers at a guess but they have a deliberate pattern that is more than a part number would look like if it were my shop. Don't know what else it could be to be written there.
Assembly line guys writing notes on the engine would have to get a head slap for stupidity and a performance tuner? maybe? send the pic to a tuner to see if makes any sense to them? you got me thinking too now.