Everything bellow created similar sounds in the past.
- seat support rails - put some oil where metal goes inside plastic
- bottom bracket - remove, clean very well, grease where needed/required.
- pedals - clean and oil all moving parts
- chain rings - make sure all bolts are tight
- cassette - make sure its not lose
You may also check cables, suspension and any added accessories.
I wasn't happy with the service at my local bike shop, so I started buying all needed tools, watch YouTube videos and now I'm happier with myself than with Specialized certified mechanic lol Its not a rocket science...most of the stuff is extremely easy. All you need is the right tool and common sense.
Last edited by lopek77; 02-20-14 at 08:41 AM.