OKAY! Here we go again with the FREAKIN WD-40. WD stands for water dispersal, 40 means that the first 39 really sucked. WD-40 is a SOLVENT, not a LUBRICANT!!! Anything that takes bumper sticker adhesive off of your car is NOT going to be good at keeping your chain running smoothly for very long. It will simply attract dirt and gunk everything up. Take the padlock off of your wallet and spend the $4 on a bottle of decent CHAIN LUBE. You spend good money on a bike and parts, don't be a cheap prick about keeping things tuned and lubed properly.
END SOAPBOX