Join Date: May 2011
Location: San Diego County
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Sometimes on a cold start, the valves haven't expanded yet and there's more clearance, thus you get a slight solid knocking sound until it warms up in a few minutes. Also, as they said, oil breakdown or the improper oil weight (or cheaper car oil) can make it sound that way.
My 2006RR makes a knocking noise that has been traced to the cam chain tensioner and after a minute or two of warm up it goes away (fresh synth oil). I assume the oil jets just need a little time and warmin gup the oil to squirt it on the CCT to quiet it down. But, as noted, the CCT seems to go out on these models more than others so I'm keeping an eye on it and will replace it if it gets way noisy.
"If your wheels are off, answer to your God but me, I'll be up and gone. I'll be up and long gone..." Robin Trower, "Little Bit of Sympathy 1972
"Veni, Vidi, Vici." Julius Ceasar (I came, I saw, I conquered)
"Nana Korobi- Ya Oki" Japanese Bushido saying- "Get knocked down seven times, get up eight!"
Last edited by fuzzbutt; 07-05-2011 at 08:04 PM.