Re: 125cc xsport/lifan engine???
12mm pin?
I've heard of 13 and 15mm, but not 12. Strange.
If the long engine bolts are M7, then a YX140 barrel will go straight on.
A YX140 piston runs a 13mm gudgeon pin.
If they are M6 engine bolts, then afaik, the biggest you can go is 125cc, unless you get a barrel bored out yourself.
Ben
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