Ya, when I bought the kit I measured the ring gap, when I did this I swear I noticed that the cylinder looked a little oval. I figured it wasn't a big deal, and it was probably my imagination. This guy seemed reputable so I trusted it was OK. I didn't take any measurements on the cylinder though. After I installed it and it failed he mentioned his good Cylinder guy had left and his son had done the work on mine. I had sent him back the busted one, assuming he might replace it, but he wanted to charge me for new stuff. No way, not after it had just failed so bad... So I just bought some used stock stuff on Ebay for cheap. Kinda wish I had taken a measurement on the busted one before sending it back for my sanity on this matter. The piston had partially seized, scoring the crap out of everything. It was running, but with really bad piston slap. I can't help but partially blame myself though, after it failed when I drained the oil I noticed it was severely low. This was surprising because I had only gone 500 miles since changing it... though thinking on it now, I did ride home another 5 miles after it had its seizure it could have eaten a lot of oil in that time, as the seals would have been pretty messed up. It failed as I was going WOT up a big ass hill. This was at 1500 miles so I was sure that I was broken in all the way. This was actually also the first time I opened it up to its max and held it there. I was watching the mph climb and at 98 or so, it very suddenly felt like it was running out of gas bad, I cut the throttle and immediately started loosing speed very fast. I reopened throttle to about half way and was still loosing speed hard, but it leveled out at around 40mph which I kept it under until I got home. This happened back in June of 2015 I bought the stuff in like Jan 2015.