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source of the knock (Read 139 times)

simm22

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source of the knock
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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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28663 Tucson Az Gender:	Re: source of the knock Reply #1 - 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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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: source of the knock Reply #2 - 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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Mattdw Full Member Offline Posts: 193 Frisco, TX Gender:	Re: source of the knock Reply #3 - 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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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28663 Tucson Az Gender:	Re: source of the knock Reply #4 - 07/28/12 at 13:35:37 +1 Matt... good to check the easy stuff first...
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simm22 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 19	Re: source of the knock Reply #5 - 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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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: source of the knock Reply #6 - 07/30/12 at 09:43:41 Like Matt said, check the motor mounts out,
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simm22 YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 19	Re: source of the knock Reply #7 - 07/30/12 at 11:51:06 Will do! Thanks
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Mattdw Full Member Offline Posts: 193 Frisco, TX Gender:	Re: source of the knock Reply #8 - 08/02/12 at 10:08:50 simm Did you end up getting this one figured out?
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CalisOsin Senior Member Offline Rather die, than live down on my knees. Posts: 297 Orange County, Ca Gender:	Re: source of the knock Reply #9 - 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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