I heard the valves chattering on my klr and figured I needed to re-shim it, when I got it apart, I found that the exhaust camshaft had spun a bearing and ruined the shaft. I'm trying to find parts now and ran across the " Hot Cams" on klr650.com . Has anyone tried these, and what if I don't need the intake camshaft? Looks expensive to buy both, is it worth it? Thanks for any info!