bore size

so i'm fairly new to motor repair but i think i need a new piston and rings for a 47cc. sachs 505\1 engine. but every description of a piston i find refers to bore size. my question is, and this might be a dumb question, but, how is the bore size measured? how can i find out what size piston i need?

Re: bore size

Micrometer. You can take the cyl. to a machine shop and they'll mic it for you. Do you have a shop manual? If not,get one ASAP. Handy Bikes or www.mopedwarehouse.com will have your piston and rings and new head and base gaskets.

don-ohio

Re: bore size

Excellent, thanks.

Re: bore size

Sure! Hope you get it runnin' like `a scalded dog',Alex! don-ohio

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