New to the site, my rc is making a noise - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 12 (permalink) Old 10-14-2013, 12:25 PM Thread Starter
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New to the site, my rc is making a noise

hey guys my name is ryan and i just bought a 2000 honda rc51 and after using it for 15 minutes i noticed that when im in neutral the bike is making a knocking/vibration noise that will go away the second I pull in the clutch then will come back as soon as i let it back out.Im not sure if its doing it when im riding because the bike is to loud to hear it.The bike seems to drive fine so not sure what it is.Any help would be awesome.
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post #2 of 12 (permalink) Old 10-14-2013, 06:35 PM Thread Starter
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No one knows? Lol
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post #3 of 12 (permalink) Old 10-14-2013, 06:37 PM
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Check the oil for smell color....if it needs changed change it and inspect it close. Then come back.



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post #4 of 12 (permalink) Old 10-14-2013, 09:54 PM Thread Starter
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I did an oil change right after i started hearing the noise. The oil was clean and smelt like oil. After i did it i only ran it for 30 seconds before putting it away and it was still making the noise
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post #5 of 12 (permalink) Old 10-14-2013, 10:09 PM
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Check your idle speed too, Idle speed should be closer to 1300rpm at normal operating temp >180. As the engine temp approaches 200 the idle will reach as high as 1500rpm perfectly normal.



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post #6 of 12 (permalink) Old 10-14-2013, 10:12 PM
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Probably just the clutch plates rattling a bit especially at lower idle revs. When clutch is not pulled in, they can move laterally as they rotate. Part of all bike wet-clutch designs. Not dissimilar to the dry versions on Ducati, just quieter but not silent on wet clutched bikes.

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post #7 of 12 (permalink) Old 10-15-2013, 10:38 AM Thread Starter
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The bike didnt make the noise when i first got it. I rode it around the neighborhood and also let it idle for 5 minutes and never heard the noise. Once i trailered it to my work and started riding it alittle before i did an oil change i heard the noise for the first time and as soon as i pulled in the clutch half way it stopped.
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post #8 of 12 (permalink) Old 10-15-2013, 11:32 AM
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Mileage on bike? Obviously it's your clutch making the noise if it goes away when its disengaged.

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post #9 of 12 (permalink) Old 10-15-2013, 12:20 PM
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You know that when you disengage the clutch, the noise stops.
The only way to be sure is to closely inspect the clutch components.

Last edited by SubSailor; 10-15-2013 at 02:26 PM.
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post #10 of 12 (permalink) Old 10-15-2013, 02:09 PM
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Quote:
Originally Posted by johnsn10 View Post
The bike didnt make the noise when i first got it. I rode it around the neighborhood and also let it idle for 5 minutes and never heard the noise. Once i trailered it to my work and started riding it alittle before i did an oil change i heard the noise for the first time and as soon as i pulled in the clutch half way it stopped.
John,
What kind of an answer you looking for? Stig told you what could be making the noise and why.

No one here can tell you for sure why it started just after buying the bike. Maybe there is a rattlesnake in your crankcase and gets pissed off when the bike is not moving or... Maybe the bike sat for a while before you went and looked at it and some oil sludge or buildup kept the plates from rattling, and after riding the it around for a while the sustenance was cleared from the plates and then allowed to move freely and in turn rattle.

Inspecting the clutch, as Sub suggested, is the only way to know for sure what's going on.

James
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