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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> source of the knock /cgi-bin/YaBB.pl?num=1343490168 Message started by simm22 on 07/28/12 at 08:42:47 |
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Title: source of the knock Post by simm22 on 07/28/12 at 08:42:47 So I am trying to narrow down the possible sources of my 1987 engine knock. So sounds loudest in the head mid to upper left side. The knock is constant and doesn't seem to get a whole lot louder than it is at idle, when the engine is rev'd. However it is pretty loud and noticeable as it is. Sounds to me like metal clanking together. I know about the tensioner and the valve clearence which will both be corrected soon, but was just wondering if the more experienced guys could give me other possibilities. |
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Title: Re: source of the knock Post by Serowbot on 07/28/12 at 09:47:54 How's it run?... sluggish?... Since you mention the tensioner,..the chain could have slipped a cog, causing a spark knock... ... or,.. could be worse... rings or wrist pin or whatever... bad metal stuff... Carbon build-up can cause a knock, too... No way to know... |
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Title: Re: source of the knock Post by justin_o_guy2 on 07/28/12 at 10:17:16 Its pretty hard figuring out a noise when yer standin there lissnin,, just readin about it? Daaaang,,hafta call the Psychic Hotline, man, Cant tell anything about it from here, man,, Im sorry.,., |
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Title: Re: source of the knock Post by Mattdw on 07/28/12 at 12:48:09 Since you say it sounds like metal to metal and somewhere upper I would check the top engine mount. I had an '02 that rattled something fierce. Took the tank off and voila, the bolt was loosened up enough to thump thump thump and vibrate the whole bike. |
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Title: Re: source of the knock Post by Serowbot on 07/28/12 at 13:35:37 +1 Matt... good to check the easy stuff first... |
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Title: Re: source of the knock Post by simm22 on 07/30/12 at 09:04:36 serowbot~ It isnt sluggish or anything like that. In fact the bike runs great, plenty of power. It just has a knock that kinda bugs me. It isnt there on start up but seems to get a bit louder as the engine gets warm. I know its hard to tell without hearing it. Just wondering if anyone had any insite. thanks |
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Title: Re: source of the knock Post by justin_o_guy2 on 07/30/12 at 09:43:41 Like Matt said, check the motor mounts out, |
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Title: Re: source of the knock Post by simm22 on 07/30/12 at 11:51:06 Will do! Thanks |
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Title: Re: source of the knock Post by Mattdw on 08/02/12 at 10:08:50 simm Did you end up getting this one figured out? |
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Title: Re: source of the knock Post by CalisOsin on 08/02/12 at 17:05:18 I wouldn't ride when you've got a metal on metal knocking. It can be very bad (look at my history to see how bad). |
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