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8k+ rpm issues

  #1  
Old 09-20-2009, 02:38 PM
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Default 8k+ rpm issues

Hi everyone, just trying to get some input on my '02 F4i. It only has 8,300 miles on it, and I recently replaced the CCTL last season with the "newest" OEM CCTL available and it solved the pesky 5k-6k ticking noise, so no reason to switch to a manual one(I've only put about 1,000 miles on it since replacement also.) However, lately I've been getting a loud rattle/ticking starting at exactly 8k rpm's and up now. Simple stuff checks out (exhaust, headers, chain...etc) The bike is meticulously maintained so just curious if some others can relate to this...only thing I can think of is it might be the valves eventhough its not due till about 16k.....any help? thanks
 
  #2  
Old 09-20-2009, 02:41 PM
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I would get the valve clearances check and adjusted and have them check the tensioner. Sounds off, but you don't want lifter slap at 8K
 
  #3  
Old 09-21-2009, 04:59 AM
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Yeah, thats all I could really think of...
 
  #4  
Old 09-21-2009, 06:31 PM
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Could be a rod knock too. How has the bike been treated? Has it been stunted its entire life or raced? Oil level is proper, confirmed with someone holding the bike strait while another looks?
 
  #5  
Old 09-21-2009, 09:05 PM
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Since I've owned it it's been babied....really babied. I hardly even ever rev it up much past 8k+. Oil is to spec and level. However I do know the previous owner must have done his fair share of wheelies, as evident of the rub/rash mark on the top of the front fender. Judging from my impression of the previous owner and the overall outlook of the rest of the bike that would be it. I have a few CBR's and know my way around them fairly well, do about 99% of my own maintenance etc., but the thing that strikes me strange is that at idle and all the way up to 8k it sounds perfect and strong. But exactly at 8k and up is when you get the rattle/tick. I'll have to try it again, but I'm also pretty sure it's only when under a load, it doesn't do it when sitting neutral and reving it up to check it. It is very audible and goes up with the revs while riding.....Possibly in the transmission/clutch since when under a load you think?
 
  #6  
Old 09-22-2009, 10:35 PM
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I'm with OutToWin, i'd start with checking the valve clearance

but also, the problems with the oem style cam chain tensioners is that they can momentarily lose tension at high revs. this could possibly cause slack in the chain and you'd hear the teeth of the cam sprockets hitting the chains rollers. worst case scenario with that would be that eventually the cam chain jumps teeth and you bend valves or they impact the piston(s) and are sent back through the head
 
  #7  
Old 09-23-2009, 07:41 AM
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Yeah just get it checked out. Shouldn't be much. Back when I had my 01 f4i I replaced the CCT at 11k then shortly after with a manual type. And the valves were adjusted then
 
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