is boring a motorcycle engine expensive?

Question

can i do it myself? is it easy to find a piston the same size?

Answer 1

If you're asking if you can do it yourself, you probably can't.

Answer 2

Machine shops will usually charge by the number of passes they have to make. They will take about .010 a pass. As for the piston, you'll need to get an oversized piston by the same amount that you have bored the engine. If you go .030 overbore, then you need a .030 overbore piston.

You can take the engine apart yourself, but you will need to have a machine shop do the boring. good luck