Try to grease it
http://www.autohausaz.com/secure/Par...1218155698.jpg
I used motor bike chain grease which is very sticky and does not flow/drop.
In case no improvment, replace it asap.
http://www.autohausaz.com/search/pro...r%20Check/Stop
Otherwise you might have that problem
http://www.koalamotorsport.com/parts-home.asp