So I'm a new rider, well sort of. Had the bike for some months now and put on about 4150 miles on it. I'm a fan of doing the maintenance myself because it makes me learn more about bikes in general and most importantly about my baby! Anyway quick question, the manual says you should be between 35-45 MM in chain tension. I did a quick measurement after watching a video by STG on chain tensioning and noticed mine is about 38MM. I have not touched it since i got the bike. Should i just leave it alone and check back later in the season? I also did my 2nd oil change so really the 4k service is just checking the bike out for any common wear/tear and tightening some bolts if need be?