August 4th, 2013, 12:26 AM | #1 |
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Name: Elias
Location: Denmark
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Annoying noise at 2,5-5 k RPM
Hi! i did a valve job on my bike one month ago... before the valve job, my bike had this rattle noise at 7-9k rpm... then i did the job, and all valves are now perfect, however the noise came back after 500kms, but now has the range changed so it is at 2,5-5k rpm...
could it be my CCT? i tried to reset it, and then there were no noise the first 10 kilometeres, but then it came back... |
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August 4th, 2013, 05:41 AM | #2 |
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And btw if it is a valve tapping, shouldn't it be there at all revs?!
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August 4th, 2013, 06:12 AM | #3 |
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How well did you reset it?
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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August 4th, 2013, 06:26 AM | #4 |
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Name: Elias
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well i took it off... pulled it all the way in with a small screwdriver, hold it there while i screwed it back on (that part was hard as ****) and then i removed the screwdriver and heard the "pop" sound, so it should have been reset.
i have heard about a tip... screwing the CCT 2 mm out, so it pops out to next level, and then screw it back in. you think i should give that a try? |
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August 4th, 2013, 06:47 AM | #5 |
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By doing that, you would put excessive tension on the chain, accelerating wear.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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August 4th, 2013, 01:56 PM | #6 |
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tried it now, but no change... wonder what it could be
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August 4th, 2013, 02:25 PM | #7 |
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Then, I would take the cover off and verify the gap for each valve.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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August 6th, 2013, 06:45 AM | #8 |
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August 6th, 2013, 08:07 AM | #9 |
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Sorry, I don't hear well anymore. Nothing catastrophic for sure, I would verify the valves' clearance, just to have some peace of mind.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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August 6th, 2013, 08:35 AM | #10 |
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narh it runs fine too... i will take the valve cover off and check it all again, but must wait 2 days before i have the time.. :/ will use my winter gs 500 in the wait time, (if it starts -.-)
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August 8th, 2013, 10:52 AM | #11 |
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Update:
Got the cover of, one ex valve was too lose. (0,32mm) i have fixed it now, but a little problem... when taking the camshaft holder off one of the 4 8mm bolts broke! so now i got half of it up and half of the 8 mm bolt is stuck (about 1 inch down in the hole...) How the HEK do i get it up! or can i live with the 3 other bolts? |
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August 8th, 2013, 11:54 AM | #12 |
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I would find a good machine shop and take the engine (or the bike-coordinate with them before) there for a proper extraction (they have the tools and the skills).
If the bolt snapped during un-bolting, is not going to be easy for you to pull it out with just hand tools.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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August 9th, 2013, 08:09 AM | #13 |
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ok so i tried to reassembly it all again got the screw fixed... and the noise is gone!!! But a new weird noise shows up :S its like the sound from a crow, actually thought it was a bird the first few times i heard it... it comes every time i give it some gas, just one at a time.. could it be wrong timing?
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August 9th, 2013, 08:24 AM | #14 |
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Did you verify the proper angular position of both camshafts? Does it sound like pre-ignition? http://en.wikipedia.org/wiki/Engine_knocking Could it be the noise coming from the external chain?
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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