Gx140

[HDF49]

I've been given a gx140 and I was wondering if anyone knows where I can find a diagram of it and the dimensions of the cylinder. I have the head off and the cylinder has lost all its cross hatching so I need to re-hone it but I don't know if I should fit an oversize piston or not so I would like to know what the size of the cylinder should be. Looking at the cylinder head the valve seats need to be re-cut and I'll probably smooth out the ports, I might fit some stainless valves and some lighter pushrods, any other ideas to get the most out of this engine?

 

[anderkart]

Honda's got the bore size listed here: http://www.honda-engines.com/Engines_owners_manuals/ownersmanuals/gx140.htm

 

[HDF49]

Thanks I'd downloaded that but hadn't seen that. On the engine the exhaust valve seems to have a weird floating valve guide, I've looked for a diagram but can't find one. Does anyone have a diagram or a picture of inside the rocker box?