Bummer Jason, pretty sure these are treated & sleeved cylinders and can't be bored. maybe honed though.
What model VFR are you working with? used motors have gotten pretty cheap around here.
Hell, I think you could by a nice used motor for $300-500 and just slap it in.
What made you tear it apart?
03 non abs
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I think BR has the easiest most cost effective solution to get your bike bike on the road... used engine swap.
This is from the 5th gen shop manual but they are the same sleeve composition. If the temperature is manged the sleeves can be rebored like a conventional sleeve...
[image: gallery_19432_6921_55676.png]
The 6th gen parts fiche shows oversize pistons available of .25 and .50 (which I interpret to mean 25 thousandths and 50 thousandths over), so I would infer from that that boring is an option. Before deciding that however, I would wonder if whatever caused the scoring (lack of lubrication, debris in the oil, etc) has also affected the bearings / crankshaft journals. I might be inclined to pull a rod and main cap and see what they look like. If they're similar, just the machine work to get it all back in spec is going to be more than a low mile engine. My $.02.
If you do swap engines, you might consider going 5th gen. PainterBob and HighSideNZ did that (though he did a lot of internal engine mods) and has a sweet sounding 6th gen! The coil packs take some doing but it's not insurmountable.
http://www.vfrdiscus...in-a-6th-green/
This one is very long and you'll be pages and pages in before you get to his 5th gen engine build and how it came out in his 6th gen. :fing02: If nothing else, it's a really interesting read.
http://www.vfrdiscus...red-a-56th-gen/