2 Quick Questions

[WillWatts]

after cleaning and lube in my chain on the center stand I was spinning in my Wheel and I can hear a clicking sound at a certain spot in the rotation. One of the guys said the chain might need tightened but I checked, another guy said it was lubed but I lubed it. Was wondering if y'all do the same thing.
Next question is after I lose my chain I took it off the center stand and started it, and my check engine light stayed on for about five seconds longer than normal is that something I should be concerned about

 

[hemibee]

The times that I've heard clicking was either a chain that was too tight, a link that wasn't moving smoothly, or an alignment issue.

I'm not sure why the check engine light would be on longer than normal.

 

[WillWatts]

After I drove to work the clicking had stopped when I spend a tire now