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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Strange rattling sound... /cgi-bin/YaBB.pl?num=1153377842 Message started by HotCarl on 07/19/06 at 23:44:02 |
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Title: Strange rattling sound... Post by HotCarl on 07/19/06 at 23:44:02 I recently had my bike put on a dyno and re-jetted. It runs insanely better, but now there is a strange rattle at a certain rpm, no matter which gear I'm in. I checked for anything loose and I can't for the life of me figure out what the hell it is. It wasn;t there before the mods though. Could it be the valves are out of adjustment now and are making the sound? Any other suggestions? |
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Title: Re: Strange rattling sound... Post by cstout on 07/20/06 at 04:42:10 At what RPM do you hear it? Does it happen under load (i.e. climbing a hill) as well as when the engine is not under any strain? |
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Title: Re: Strange rattling sound... Post by Ed_L. on 07/20/06 at 06:01:58 Check the sheet metal, I had a rattle coming from the panel on the left side, only happened when riding. A loose baffle in the muffler can cause a rattle also, I am having that problem with the slashcut muffler I just installed on my '02 :-/. |
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Title: Re: Strange rattling sound... Post by Savage_Rob on 07/20/06 at 08:00:48 The speedo is known for rattling and there are a lot of posts concerning it. I've also had the headlight rattle before too. I stuck some wadded plastic inside and it stopped. |
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Title: Re: Strange rattling sound... Post by RadarORiley on 07/20/06 at 08:35:22 My license plate nearly drove me nutz with a strange rattling before we found it. It only happened at a certain speed. |
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Title: Re: Strange rattling sound... Post by vroom1776 on 07/20/06 at 08:46:52 Is it a rattle or a ticking? If ticking, it's the valves. |
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Title: Re: Strange rattling sound... Post by HotCarl on 07/20/06 at 11:57:32 Hmm.. I don't know if it's a ticking, could be very fast ticking... I don't know. Seems more like a rattle. I sounds like it's coming from under me, on the engine. I checked the exhaust and license plate and it's all tight. I'll check the headlight next. It is wierd becuse it ONLY happens at at a certain low RPM in every gear. |
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Title: Re: Strange rattling sound... Post by cstout on 07/20/06 at 12:19:58 Does it tick faster or louder when you give it gas or does it remain steady? Can you reproduce the sound by reving the bike to that RPM while in neutral? |
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Title: Re: Strange rattling sound... Post by Max_Morley on 07/20/06 at 13:43:19 Use a mechanics stethoscope to listen on the RH side for a the cam chain tensioner being loose. It would clatter more at idle than at higher engine speeds when it is first unable to keep the tension on the chain. Max |
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Title: Re: Strange rattling sound... Post by steelwolf on 07/20/06 at 20:25:49 I have developed a rattle as well. Mine turned out to be the license plate. While the bolts are tight, the plate has cracked about a 1/3 of the way across the plate from the right to left about an inch from the top. Really annoying till I found it. Now I just need to build a backing plate for it to keep it from flying off. ;D |
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Title: Re: Strange rattling sound... Post by smokey02 on 07/21/06 at 10:02:26 My license plate is cracked too, had to bolt on a chromed frame to keep the bottom half of it from falling off. |
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Title: Re: Strange rattling sound... Post by Ed_L. on 07/21/06 at 11:44:55 No cracks yet with my plate but it is getting a bit bent up from changing out a flat twice. ;D |
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Title: Re: Strange rattling sound... Post by MacAttack on 07/21/06 at 16:26:40 I took a piece of Plexiglas to the band saw and cut a backing plate. So far, so good. |
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Title: Re: Strange rattling sound... Post by HotCarl on 07/21/06 at 21:37:48 I can't reproduce it in neutral, and it only happens at a certain rpm while in motion. I can kind of hold that RPM and the sound will stay somewhat. The cam tensioner chain you think? Hmm, I would have to take it the dealer, I don;t have the tools to or time to fix that. My bike is under warranty though, so I wouldnt have to pay. |
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Title: Re: Strange rattling sound... Post by serowbot on 07/22/06 at 00:32:48 If the rev testing at the dyno didn't damage anything serious (doubtful if you have better performance), it's probably o.k. I can't think of anything they would do to cause scary engine noise otherwise. Maybe minor things, rattling against something else, (i.e. speedo housing, electrical connector under tank, speedo cable, etc...) They didn't hole out your piston, or blow a head gasket, obviously. I notice different sounds after someone else has ridden my bike for a while,(I'm nuts, I know!) I don't know if I'm listening different or, if the person's driving style temporarily changes the bikes happy place/rpm. Anyone else noticed/imagined this? |
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Title: Re: Strange rattling sound... Post by clueless on 07/22/06 at 05:44:47 The belt guard on mine bout drove me crazy. Never figured it out until I removed it. ;D |
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