I love KLR's! I lived aboard mine and put 30k miles on it in one year. I don't know if someone else told you this, but look up the KLR650 FAQ page and all of your questions will be answered. My bike needed nothing but gas,oil,tires,valve shims,chain and sprockets and brake pads, just basic maintenance and nothing else. It is mechanically beautiful, albeit physically ugly,hehe.
Also, the "doohickey" will break or fail to adjust! replace it with upgraded parts!