Buy the best chain u can afford.
Change the front and rear sprockets at the same time.
Cut old chain,they use wire to attach it to new chain,pull old chain out,new chain automatically gets pulled into place.
Use rivet type master, not clip type . I just use a hammer and punch to set the master, but if yer fairly new too the wrenchin' game, you can buy a special tool too attach the master link . You can also buy a "chain-breaker" , I just use my die grinder .
This is one item you dont want to fug up.
Dont cheap out . Get a chain with a minimum of 10000 tensil strenth . Get an O-ring,or an x-ring .
Get new sprockets , chains an' sprockets wear together as a set . Old sproc's will chew up new chain .
DO NOT PUT A NEW CHAIN ON WITH OUT CHANGING THE SPROCKETS OR AT LEAST CHECKING THEM CLOSE. Then go with a DID X or O your choice or a EK zvx Xring strongest around. Any good top chanin just stay away from the fancy color chain. Gold or Silver is fine. If you have to go with new sprokets get them from AFRAM. They have great service and Chrom molly fronts and Stell nickel coated back.