So I was installing new plugs and whille tightening the right rear I twisted it in to. Pics are below. I was able to use an easy out to retrieve the threaded part. None of the porcelan broke and the washer came out also. After installing another plug I tried to crank it and it poped real hard and stalled . After a couple of times doing that it cranked up and ran fine, I rode it the rest of the day , approx 75 miles . My question is could this have harmed anything?