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Old 10-27-2008, 06:46 AM   #1
gtdrivr
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Unhappy Bad noise

I started the bike Fri to come to work. I thought I heard a knock every once in a while as I was gearing up.

I started the bike Sat without a helmet on in order to listen. There is an intermittent knock while it is warming up. It's inconsistent, and it goes away when the bike warms up (~120 degrees). Any ideas?

It still runs and sounds fine once warmed up.

Oil was changed last week, level is good.
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Old 10-27-2008, 11:23 AM   #2
gtdrivr
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No input from anyone??
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Old 10-27-2008, 08:14 PM   #3
JP171
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check your oil pressure, there should be a port where you can stick a gauge the idiot light is a last resort thing, read or get a manual to see how to check it
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Old 10-27-2008, 10:17 PM   #4
qwezy
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you r right ! at this time of year (cold air,low ambient temp) i also notice this slight knocking noise too on all my bikes,my truck and my wife's car..... so i just let engine idling itself (cold idle) til i finish my smoke & few zeeps coffee (2-3 mins) n no reving engine.
i would say it's normal due to air/fuel mixture + moisture so dense !!!
wait to hear for other opinions !!
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Old 10-29-2008, 05:52 AM   #5
gtdrivr
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I think it's my clutch basket. I have read on a few CBR forums that it is pretty common for things to start to loosen up around 18-20k miles and make a knocking noise. (I'm just short of 19k)

I pulled in the clutch for a few seconds yesterday while it was warming up and it seemed to stop. I'll have to tie my clutch lever down and start it up cold and listen for it.
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