When you say 10 kays do you mean 10,000klm or just 10klm?

Sand paper? What grit? Why?
If they had only done 10ks I wouldn't have touched them but someone wiser than me must have told you to do it

you said sand paper not 2000 wet and dry so I would say get them to a pro to check and maybe a fine hone to restore them. make sure you WASH THEM THOROUGHLY before assembling

well you just turned a good possible reusable set of jugs into door stops , back to the machine shop

get a set of 107ci CP pistons and have them bored to suit

You would be better served to ask BEFORE doing.
Plenty of peeps on here with experience to keep you on track.
Prolly save you a shitload of money too.

I hope you dont take offense to my posting as I'm only wanting to provide constructive advice that I hope will benefit you. Having read a few of your posts with your current and former usernames, in the advice you have sought and the outcomes of your work, maybe it's time to take at least your engine related work to a professional shop.

+1 there mate....the OP should seek professional help via a proper shop as the bike will be cactus if this carries on!

+3

I usually just pull mine, set em on fire then rub them with a bit of acetone every 10 or so kays....sandpaper seems like such hard work

Entertaining!!  

Juat add a bit of tassie oak, sand and enjoy.

and that will be the shortest life in history for a postie bike if you and your top machinist have any thing to do with it

At least your doing it yourself mate! The key thing is "if in doubt ask!" We just get a little worried here from time to time as no one likes to see folks fuck things up as it gets bloody expensive very quickly (or fatal if you really get it wrong)

got my morning laugh finding this thread

thanks to all posters

Classic stuff.... Don't forget to gap yr rings, 9" grinder should do the trick