sloar 

i apologize if these questions have been asked before, i am new to track bikes so please be gentle. i just picked up a 2013 felt tk3 off a guy that bought it just to ride around. how tight is the chain suppose to be. right now its so tight that the wheel and cranks dont spin freely. i feel that its way to tight, but again i have no ideal with track bikes. whats a good rule of thumb for tightening the chain?. also right now i have the stock 48-15 setup on it. i have no intentions on upgrading anything with the bike until i'm sure this is something i want to pursue. but i do plan on getting a couple different size rings and cogs to play around with. what are some good quality rings and cogs. ive noticed people like the fsa pro track rings, but which cogs.? just for reference i live about 40 minutes from the major taylor track, and probably will only race there. for now! thanks..