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Noise from engine head when accelarating past 6k rpm

985 Views 18 Replies 5 Participants Last post by  Big Cahuna
So i got a 2013 CBR250r with 52000kms. Recently changed both camshafts and rocker arms, also adjusted the valve clearance. But soon after, this problem arises. Whenever i go past 6k rpm, a metal ticking noise comes which is pretty loud and it goes like Trrrrrrrr. This noise feels like its coming from right under the fuel tank( Where the head is located). It stays there as long as i am above 6k and vanishes as soon as i go below 6k rpm. It happens only when the bike is moving and so i cant really make a video of it. I have searched everywhere on internet but cant find a similar thread. Can anyone help?
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Probably just cam-chain tensioner not as tight as before.

Worst case, It sounds like the timing is off one tooth. Maybe the valve is lightly tapping the piston because the spring doesn't have enough time to return the valve to the closed position.
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