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C908
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« on: March 25, 2009, 05:48:50 PM » |
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Ok the search for the mysterious noise continues. Through trial and error I now believe my front end sound maybe coming from the timing belt area. I put my bike up on a lift and let it run while listening for the sound. Best I can describe it has a deep gravely sound almost like rocks bouncing around behind the cover. I always hear this noise at about 30 to 40 mph. Once my speed increases I can't really hear it but I feel its still there. My bike only has 38,000 miles and I'm the original owner so I know its never been abused. I'm trying my best to avoid going to a stealer but I'm getting tired of searching for the problem. Anyone have suggestions? Thanks!
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Chrisj CMA
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« Reply #1 on: March 25, 2009, 07:37:27 PM » |
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Maybe a belt is loose and making a rumbling sound
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bigvalkriefan
Member
Posts: 407
On the green monster
South Florida
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« Reply #2 on: March 25, 2009, 08:05:14 PM » |
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If you have or could get a stethoscope that could help isolate the problem.
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.....say to those with fearful hearts, "Be strong, do not fear; your God will come, he will come with vengeance; with divine retribution he will come to save you."
Isaiah 35:4
I know who wins in the end.
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Jess from VA
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« Reply #3 on: March 26, 2009, 05:58:59 AM » |
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A poor man's stethoscope is a piece of brake line. It may not tell you exactly what it is, but with a little time, you should at least be able to isolate where it is coming from.
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Al buquerque
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« Reply #4 on: March 26, 2009, 06:25:07 AM » |
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I highly recommend that you pull the cover and have a look in there. It's pretty easy to do. If one of your belts lets go, you are really going to mess it up.
The sound might be your idler pully bearings going bad or a bunch of other things. Also could be that part of a belt is starting to de-laminte and a piece is slapping the housing as it goes around in there.
I'm sure that someone out there can verify this, but I'm pretty sure that the valves on the Valk have what's called and "Interferance fit" which means that if the valve timing is off due to a broken drive pully the pistons will hit the valves as they come up through top dead center position. This would really raise hell for you.
A light "ticking" noise is normal, especially when the engine is still cold. It has something to do with the trigger wheel for the ignition. Tends to go away when it warms up. But nothing should sound like rocks thrashing around in there.
Better safe than sorry.
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Udo
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« Reply #5 on: March 26, 2009, 08:59:11 AM » |
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And, if helpful, it´s not a problem, to let the engine run with the cover removed, to detect the source of the noise....
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F6Dave
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« Reply #6 on: March 26, 2009, 08:37:46 PM » |
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Pull the cover and run the motor, you might hear or see something. Also, WARM the engine up before removing the cover -- that makes the bolts easier to remove, especially the long one with sealant on it.
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sugerbear
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« Reply #7 on: March 27, 2009, 10:41:44 AM » |
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mark where each bolt came from on the cover. you'll see why.
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Madmike
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« Reply #8 on: March 27, 2009, 04:08:18 PM » |
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A long screwdriver can be used to help find sources of noise - touch the end to various spots on teh front cover while pressing the ear to the grip end of the screwdriver.
Someone mentioned that the F6 is not a "free running" engine - the valves will hit the pistons if they are far enough out of "time" such as when a belt breaks or if the crankshaft or cams are turned over with the belts removed. If you search the archives from the old tech board I believe that you will find this is mentioned there along with some precautions and procedures that you may want to look into.
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C908
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« Reply #9 on: March 27, 2009, 08:58:57 PM » |
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Thank you everyone for your suggestions. The soon as time and weather allows I will be pulling the cover and hope to find the problem. I will post my findings.
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Al buquerque
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« Reply #10 on: March 28, 2009, 08:51:22 AM » |
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Let us all know what it was that you actually found in there. Curious minds need to know...
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Ricky-D
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« Reply #11 on: March 28, 2009, 11:19:08 AM » |
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I would still suggest locating the source of the noise with every available means before attempting to take parts off the motor. There are so many different noises that you may experience and they all are not always harmful.
Determining the source is the key. Stethoscopes, screwdrivers, hoses all are good aids. Find the source.
Look for clues, oil, water, seepage whatever, don't overlook something simply because it doesn't seem reasonable to your perception of the noise.
Look in the shop talk for discussions of existing noises that are inherent with the Valkyrie. There are a bunch!
Find the source.
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2000_Valkyrie_Interstate
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C908
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« Reply #12 on: March 29, 2009, 04:42:41 PM » |
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Well I just wanted to report that today I pulled the timing belt cover and let it run. Everything looked and sounded fine. Someone asked if I am using a service manual and the answer is yes. I am also using the method suggested by holding a wooden pole to the different areas listening for the mysterious sound. I also pulled the alternator cover and checked it out but it seemed fine. I keep wondering if its possible the front tire is making the noise. I have heard the typical tire noise with different brand tires when taking corners but this noise is when I'm going dead straight ahead mainly in the 25 to 40mph range. I think I will post another question in regards to Dunlop E3 tires.
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Madmike
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« Reply #13 on: March 29, 2009, 07:42:50 PM » |
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Do you hear the sound when the engine is running and the bike is stationary or just when you are moving?
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Skeeter (Va)
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« Reply #14 on: April 20, 2009, 01:28:14 PM » |
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This is not a joke.....I was going batty with a high frequency type rattle...after my son got under the bike and listened at various RPM, we found the chrome hydraulic site cover that has a dowell that positions in a slot on the chrome cover was the culprit. The chrome dowell was vibrating on the edges of the slot. It's on the right side of the bike, straight up from the foot peg. You'll know what I'm trying to say when you look at it. After I mentioned this about 5 yrs ago, some other guys found that problem as well....No harm to check it out....
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Life's tough....It's even tougher if you're stupid.... 1998 Blk..Valk Std...1971 Honda 750 Four...
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DFragn
Guest
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« Reply #15 on: April 20, 2009, 02:42:02 PM » |
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Gravelly ?
That is also the sound of the clutch when a few rivets have failed in the compression plate.
If that is what it is you should hear it at idle in neutral and it stops when you bring the clutch lever back to the grip.
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