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my valves. .... bike runs great. .! but reving down, starting about 3 rpm a LOUD clapping sound comes from the valve covers right side.... it stops around 2, 2 1/2 rpms.... no loss of power, but im scared as hell, ive parked it afraid ill do catastrophic damage. ....

has anyone had this before? I had the entire top end done about 20 k miles... it now has 44k miles...

im sure its gonna be another valve job..... ugh..... I may just sell it cheap and be done....
 

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my valves. .... bike runs great. .! but reving down, starting about 3 rpm a LOUD clapping sound comes from the valve covers right side.... it stops around 2, 2 1/2 rpms.... no loss of power, but im scared as hell, ive parked it afraid ill do catastrophic damage. ....

has anyone had this before? I had the entire top end done about 20 k miles... it now has 44k miles...

im sure its gonna be another valve job..... ugh..... I may just sell it cheap and be done....

Do you hav the mechanical ability to work on your bike?
Possible cam chain tensioner? But need to get the cam cover off and look.
Cam tensioner is $100. Fairly easy to do. So before you throw in the towel you need to investigate or take it to someone who can do the work.
If it's running good it may be something simple.

cmg
 

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Do you hav the mechanical ability to work on your bike?
Possible cam chain tensioner? But need to get the cam cover off and look.
Cam tensioner is $100. Fairly easy to do. So before you throw in the towel you need to investigate or take it to someone who can do the work.
If it's running good it may be something simple.

cmg
I totally agree with this , check it doesn't have an adjustable tensioner instead of the oem hydraulic one as well .
 

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when my y2k engine blew up it kinked the timing chain.
 

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Keep in mind, if there proves to be nothing wrong with the cam chain tensioner, but it is extended all the way to the limit, then as Mark points out, the timing chain could be shot. A timing chain replacement will be a lot more involved.

cmg
 

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Also if you do have to change your cam chain here is a nice short cut that will save you from splitting the case`s. Take off the valve and timing covers.Line up all the timing marks as per the service manual. Use an electric engraver to etch exact marking on the timing chain links and sprockets. If you find your chain is ok and want to put it back on this will help alot.....GET EVERYTHING EXACT.
SO YOU DON`T HAVE TO SPLIT THE CASE`S DO THIS.
Take the cams out.Remove the timing rotor.Stuff full the area behind the rotor /cam chain with paper towels.Take a dremel tool with cut off disc and remover the small aluminum casting that prevents the cam chain removal.
 

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Mark, I could be wrong but aren't chains case hardened? If so, wouldn't etching them weaken the link? After all the work of disassembly you might as well throw in a new one and never worry about it again. Good advice for a quick replace.
 

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all that is really done is put a scratch on them.Ya really have to look close to even see it.I put 50,000 miles after the first valve adjustment and that`s the truth.I don`t think you can even feel it with your finger nail.I have done it on different bikes too.No worries for sure.It`s just the side plates and side of cam.R & d motorsports puts your initials on every part you send in for transmission work also.
 
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