Rhoderman
Or Jim, whichever you like, I'm one of those odd ball out kinda guys. I don't like bored motors of any kind really, much less the single cylinder Kohler K series. The engine is already out of balance, and it just seems it will worsen the effect with an over-bored piston. I don't have any problem with work to the crankshaft, bored out with inserts, oversize etc, it's the piston/bore I think should stay the same. If you have the money, or it's not to expensive I would have it sleeved... That being said I think having a block sleeved is going to cost you, so in that respect I will go with Merk's opinion (from what I got from his post) If the block needs bored out I would look for another block then. If the block is in good shape, I would just replace what is needed/worn etc. That's just my stand on what to do, if you are in a area that you can get access to a machine shop, or the services cheap, then by all means you make the choice. The missing chunk in the block however is only cosmetic, but you have to keep everything in mind when you go to sink a large sum of money into it.
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