I recently got done building up an old Stumpjumper with lots of NOS parts. The one giving me trouble is the Deore LX rear derailer, circa 1994. The problem is that it doesn't tension the chain enough. Every time I go over a bump the chain is slapping the chainstay. It's really annoying offroad. I will probably get a chainstay protector, but the chain is still way too loose for my liking. None of my other bikes have this problem.
Is there anything I can do to the springs to make them pull more? When I cut the chain I did big/big +1. Can I take a link out and just never use the big/big combo?