I have a '99 summit x with 1-2k miles on a used but rebuilt (top-end, so I was told) 670 from a 97 or 98 summit. It's gotten progressively harder to start over the last 2-3 seasons. It goes from too lean to flooded without really firing. Worse when its cold. It also started bogging at WOT. I cleaned and went over the carbs, and they seemed to check out. Currently not getting spark but that could be due to fouled plugs. The compression is just over 100 and fairly even between the 2 cylinders. Based on all this and knowledge gained from this forum, I am rebuilding the top end. Totally happy with stock performance just want it to start reliably. Cracked it open tonight and the cylinder bores look clean, no visible lips/steps. I will attach some photos of these. My question is what do I need to replace for a top-end rebuild. Seems like I could get away with a honing of the cylinders, new rings and gaskets. Can I hone it myself or is it better to have a machine shop do this? Any recommendations of shops in Missoula Montana? Do I need new pistons? New needle bearings? Any tools beyond a torque wrench and a ring compressor? Any important tricks to rebuilding these things?
Thanks in advance!