ChinaRiders Forums - View Single Post - Gio X31 build-up thread

goofyexponent · 01-12-2012, 05:21 PM

YEP! She is an OHC engine.

Currently there is no market for a high compression piston for the Zongshen CB250 (overhead cam engine) but apparently it is in the works..

What I might do in this case, is just plain the cylinder down, try and find a thinner head gasket (if not, plain the cylinder own some more to compensate) and stick it back together.

Maybe I can save a little more coin and go with a bigger bore cylinder like the XR200's and throw an oversize bore kit in THAT to REALLY pump up the CC's and compression.

I am not sure what to do here....any suggestions?

Should I put an XR200's cylinder and piston in it? What is the bore and stroke of an older XR200?

01-12-2012, 05:21 PM	#20
goofyexponent Join Date: Jul 2011 Location: Halifax, N.S. Posts: 145	YEP! She is an OHC engine. Currently there is no market for a high compression piston for the Zongshen CB250 (overhead cam engine) but apparently it is in the works.. What I might do in this case, is just plain the cylinder down, try and find a thinner head gasket (if not, plain the cylinder own some more to compensate) and stick it back together. Maybe I can save a little more coin and go with a bigger bore cylinder like the XR200's and throw an oversize bore kit in THAT to REALLY pump up the CC's and compression. I am not sure what to do here....any suggestions? Should I put an XR200's cylinder and piston in it? What is the bore and stroke of an older XR200? __________________ Gio X31 Paid $440 for the bike new in the crate! Currently a modified, high compression, head turning MONSTER!
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