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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> bike making "chirping" sound /cgi-bin/YaBB.pl?num=1271890081 Message started by Bryan on 04/21/10 at 15:48:01 |
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Title: bike making "chirping" sound Post by Bryan on 04/21/10 at 15:48:01 okay, I know this might sound a little ridiculous, but I let my friend borrow my bike for a month or two, and when I went to get it back, it's making kind of a high-pitched metallic "chirping" or pinging sound. I started her up the other day and walked around the bike to try to hear where the sound was coming from. It sounds like it's coming from the muffler. What does that mean--that it's coming from the engine? Because I figured I wouldn't be able to describe the sound very well, I made a recording. The quality is terrible, but you can hear the high-pitched chirping sound if you listen closely. The sound of the engine changes as I move the recorder various places around the bike: chirp.mp3 (http://www.upload-mp3.com/files/182095_ndk7z/chirp.mp3) Any ideas? The bike seems to be running fine as far as I can tell, but it's gonna become my only means of transportation for a while so I wanna make sure it's running well. It's got less than 3000 miles on it, and it's a '96. I had a petcock problem for a while and I think some fuel may have leaked into the engine, but it was a small amount so I just figured it'd burn off. I left oil with my friend and showed him how to check it while he had it as well. |
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Title: Re: bike making "chirping" sound Post by Reelthing on 04/21/10 at 16:08:04 might be fun to hear - but it says access denied |
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Title: Re: bike making "chirping" sound Post by Bryan on 04/21/10 at 16:11:11 oops, try now |
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Title: Re: bike making "chirping" sound Post by bill67 on 04/21/10 at 16:18:55 Sounds to me like its missing a little. |
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Title: Re: bike making "chirping" sound Post by Reelthing on 04/21/10 at 16:28:22 man I can't hear a chirp - stock muffler I take it? does sound like it's only running one cylinder |
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Title: Re: bike making "chirping" sound Post by james may on 04/21/10 at 17:46:54 sounds like a lawnmower.. it's hard to make out any kind of high pitch chirp. you could be hearing the valves clicking if the exhaust is leak at the header connection this could have happened if the exhaust was knocked or the bike was layed down on the exhaust. you'd need a new crush washer or maybe you could try tightening it down more. could try tightening at header and at the slipon joint. valves could need adjustment. |
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Title: Re: bike making "chirping" sound Post by Serowbot on 04/21/10 at 17:52:38 belt chirp,... speedo chirp.... Those are our two most famous chirps... if it ain't one,... it's the other... ;)... |
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Title: Re: bike making "chirping" sound Post by kk lewi on 04/21/10 at 18:13:28 my bike "chirps" when I first start it after a night of sitting. Guessing it's the valves. After the oil gets moved around it doesn't chirp. Prolly need to adjust the valves too (2000 miles and not been adjusted), but I'm not confident on my ability on that yet... |
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Title: Re: bike making "chirping" sound Post by buttgoat1 on 04/21/10 at 18:20:49 I am wondering if you have developed a hole in the muffler baffle, rusted out or something, and now it causes the whistle. It has had a few years to collect condensation. Skat just had her baffle blow out completely, maybe this is just not as severe.. |
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Title: Re: bike making "chirping" sound Post by verslagen1 on 04/21/10 at 18:56:01 check around for loose hardware, pulley or belt covers. speedo is capable of making a lot of different sounds too. |
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Title: Re: bike making "chirping" sound Post by Sandy Koocanusa on 04/21/10 at 19:01:24 I know you said muffler, but I had a devil of a time locating my chirp. It moved depending on which way I cocked my head. Turned out it was the speedo rattling, instructions for the repair of which are abundant on this site. My headlight pulled the same stunt later. It's easy enough to test those two... Just hold your hand firmly on one and then the other. If the noise stops, you can fix it with nine cents worth of silicone, instead of two hundred dollars worth of tailpipe. Best of luck. |
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Title: Re: bike making "chirping" sound Post by Reelthing on 04/21/10 at 19:07:15 if understood right this chirp happens sitting still at idle - guess could be a loose something or other and a routine tighting up of everything you see might fix - so it go away when you're ride? |
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Title: Re: bike making "chirping" sound Post by Routy on 04/21/10 at 19:16:56 Just ride it ! |
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Title: Re: bike making "chirping" sound Post by jlsmedic on 04/21/10 at 21:01:05 I had a chirp and found it to be my spedo mount. next time my tank is of a quick tighten of the nuts should do. |
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Title: Re: bike making "chirping" sound Post by fascar228 on 04/22/10 at 04:44:05 i have the same chirp comes and goes , i have s40 1500miles....drives me crazy.....its the speedo mount |
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Title: Re: bike making "chirping" sound Post by Charon on 04/22/10 at 06:12:40 I always use earplugs when I ride, because of the wind noise. I didn't even realize the belt was squeaking until I happened to drive the bike a short distance without the earplugs. Earplugs work best for high-frequency noises, which seems to include squeaks and chirps. I think I got the belt squeak cured, but I have no idea whether the speedometer or the headlight might be making noise. |
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Title: Re: bike making "chirping" sound Post by james may on 04/22/10 at 09:19:02 Quote:
I've heard your not supposed to drive while wearing headphones because you can't hear horns and sirens etc. just wondering if riding with earplugs are a good idea. |
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Title: Re: bike making "chirping" sound Post by buttgoat1 on 04/22/10 at 11:45:16 ride it without ear plugs, at least for a short trip regularly, to keep in tune with the normal noises. |
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Title: Re: bike making "chirping" sound Post by Ebikerman on 04/22/10 at 19:25:39 My 06 S40 has a chatter on acceleration. Turns out that it can be modified to a degree by adjusting the mixture screw. I believe this chatter is actually a type of pre-ignition. Premium gas did not help, but richening the mixture screw quieted it until the engine became hot. I have done the spacer mod, but may need to completely remove it. My mechanic said that some big singles make firing noises I think due to the flame spread across the large piston. |
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Title: Re: bike making "chirping" sound Post by sansone on 04/23/10 at 04:56:48 my belt chirp (too loose) drove me nuts until somebody here told me to tighten it. Your chirp happens at idle so that rules-out the belt. On the recording it sounds like a valve/cam chirp. Try changing the oil, I like the synthetic Rotella diesel rated oil 15w-40.. this may start an argument :D |
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Title: Re: bike making "chirping" sound Post by Bryan on 04/23/10 at 08:29:31 Yeah, it does it at idling, so I'm guessing not the belt. I could change the oil, but I've changed the oil and filter less than 500 miles ago. I'm using the synthetic Rotella diesel oil as well, although I seem to recall it being 5w40, but I don't really remember. Could I have caused damage by leaving fuel in the oil? I'm not 100% sure there was fuel in the oil, but I was having petcock problems for a while, and around that time it seemed that the oil level went up a little, so that was my guess. For some reason I never actually took the time to see if it smelled like gas. It was enough to raise the oil level a little, but it didn't seem like very much, so I just figured it'd burn off. I'll check the speedo, although it does sound like it's coming from the muffler, so I was thinking something in the engine was causing it. |
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Title: Re: bike making "chirping" sound Post by Phelonius on 04/23/10 at 09:37:43 The chirp is the bike saying "I want a chain drive" in bike language. I put the front pully on one side of my garage and the rear pully in another and gave away the belt. I set up the machine for a 530 chain and sprocket . It no longer chirps For an improvement search this site for snoodleflapper. Phelonius |
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Title: Re: bike making "chirping" sound Post by bill67 on 04/23/10 at 09:50:40 66717E797C7C71686462717B64100 wrote:
I would change the oil and put in motorcycle oil and at least 10+40 oil I use 15+50 and I live in Wisconsin. |
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Title: Re: bike making "chirping" sound Post by Bryan on 04/24/10 at 20:11:47 252E2B2B7170470 wrote:
I would change the oil and put in motorcycle oil and at least 10+40 oil I use 15+50 and I live in Wisconsin.[/quote] Really? it seems I read somewhere that synthetic oils usually come in smaller numbers (i.e. 5W 40 instead of 15W 40) and that a 5W 40 synthetic isn't the same as 15W 40 dino because it performs better. But I don't know. Anyway, I've found all kinds of things wrong with the bike. The heat shield on the muffler was missing two bolts, and there was a nut missing from the brace the muffler bolts on to in the back. The nut that was there was so loose I could turn it with my fingers. The bolts where the exhaust bolts to the engine were both loose. When I took the gas tank off, the speedo cable fell completely off, so it must not've been on there tight. I went ahead and invested in some of that blue goo you put on bolts to keep em from vibrating loose. I can tell I'm gonna need it. One of the painted metal covers on the side fell off the other day cause the screw had worked its way out. wish i'd known beforehand, now it's all scratched up. maybe some good wisdom to pass onto newbies like myself. I adjusted the valve clearance since I've never done that before, and I had trouble finding TDC on the compression stroke because the Clymer says you'll find it when "both rocker arms have free play." The exhaust rocker arms were the only ones that had any free play at all, and both sets had way less than minimum clearance. Could that have caused my noise? I still haven't started it yet cause I also tightened the bolts on the cylinder head so I'm waiting for the gasket goo to dry. I'm also running the "hot" spark plug. I was told that it didn't matter, but according to the Clymer, the hot plug is only for "low speeds, low engine loads and low temperatures," so I'm wondering if the spark plug could be an issue as well... Sorry for these long posts, it just seems like one thing after another. |
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Title: Re: bike making "chirping" sound Post by bill67 on 04/24/10 at 20:17:05 I wouldn't use a hotter plug than the standard it calls for. |
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Title: Re: bike making "chirping" sound Post by RTC on 04/24/10 at 22:04:11 i have never had a chirping sound at idle so i may nott be much help. but..this bike is full of rattles of various and unimportant types. the first i noticed was the speedo, which i fixed with some silicone on the mount screw. and now i can hear the headlight rattle when riding at mid to high rpm in second and third gear. other than that i have no chirping. i have hear that when you hear that it means you need to adjust your valves but it seems youve done that. torque up everything you can. |
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Title: Re: bike making "chirping" sound Post by Bryan on 04/25/10 at 18:02:01 Well, cranked her up today after letting the gasket goo dry, and she's chirping just as much as ever, even after all the problems I found and (hopefully) corrected. A couple more observations: The chirping seemed to increase as I gave it more gas. In fact, once the bike warmed up and I pushed the choke in, I couldn't hear chirping unless I gave it gas. The bike has been backfiring really loudly the last couple of times as I turn it off. I always thought that was good, cause it seems to backfire louder when it runs well, as opposed to when I was having petcock issues and it was running rough. But does that really mean anything? |
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Title: Re: bike making "chirping" sound Post by Bryan on 05/10/10 at 09:06:00 I was gonna take a look at the cam chain and see if that was causing the noise, but I wasn't exactly looking forward to draining the oil, taking the exhaust and engine cover off, and having to replace gaskets, etc. I woke up with a stiff neck the day I was planning on working on it, so I finally gave in and took it to a shop. They started it up, listened, and told me that it was simply a matter of the exhaust being rusted internally. Thankfully they weren't crooks and didn't charge me anything. so... I shoulda just taken Routy's advice and just ridden it. at least I can have the peace of mind now that I'm not causing any damage and can finally just go out and ride :) what can I say... this is my first bike, and I'm paranoid. I'm definitely way less concerned when it comes to my car. I had it looked at a year ago cause the steering/suspension was making a terrible noise and they told me one of my wheels was about to fall off. I've been driving it since--just haven't gotten around to fixing it yet :D |
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Title: Re: bike making "chirping" sound Post by verslagen1 on 05/10/10 at 09:10:20 6D7A757277777A636F697A706F1B0 wrote:
Give the idle mixture screw a 1/8 to 1/4 turn CCW to richen it up a little and reduce it down to a poof. |
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Title: Re: bike making "chirping" sound Post by GrateFuLDad on 06/09/10 at 08:56:55 I had this same chirp .. come to find out i had a loose vaccum hose or pin hole in it... i changed vaccum hose and the chirp went away.. now i dont worry about that as i am using a yamaha assy and dont need the vaccum line.. good luck |
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Title: Re: bike making "chirping" sound Post by weracerc on 06/09/10 at 11:51:01 I have a 96 and it had the stock exhaust on it that had been "drilled out" by the previous owner - i thought it sounded like a bell ringing but i suppose a chirp would be about the same - i put a jardine slip on it now it growls (evil big single) vs chirping (whimpy whimpy whimpy)......problem solved. |
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