SuzukiSavage.com - Odd clack noise

Mal

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Odd clack noise
04/18/13 at 18:34:39

Hello fellow motorheads! I recently bought a 95 savage that had been sitting a few years. The cam tensioner needed modded so i bought the bike and did the mod immeadiately, along with an oil change and a carb tune up.. Now that the bike runs, it has a slight clack noise. Almost as a rod knock, but only happens at certain RPMS usually under load. When I was doing my tensioner i noticed for some reason there was no gasket in between the header and exhaust port. Also one of the studs was broken. I know that an exhaust leak can be loud, but can it be that loud and only happen under certain circumstances? I use a screw driver as a stethscope and the noise did not amplify through the screw driver when it was touched to the bottom end. Im an idiot and did not check the condion of the spark plug. so i guess it could be spark knock. Does anyone have any other suggestions of what this could be?

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18101 Camp Springs, Kentucky Gender:	Re: Odd clack noise Reply #1 - 04/18/13 at 18:48:19 I had a horrible knock develop in my bike.....it was the flywheel nut on the left side of the crank coming loose.
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Mal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 9	Re: Odd clack noise Reply #2 - 04/18/13 at 18:51:49 Really... I will have to check that. Thanks for the input!
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Mal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 9	Re: Odd clack noise Reply #3 - 04/21/13 at 11:11:13 anyone else?
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verslagen1 YaBB Moderator ModSquad Online Where there's a will, I want to be in it. Posts: 28889 L.A. California Gender:	Re: Odd clack noise Reply #4 - 04/21/13 at 11:45:45 I had a knock you could hear thru the bottom end, turned out to be a burnt piston. if you got a fiber optic scope, look in the sparky hole at the edges of the piston for a melted spot. but I suspect your piston skirt maybe a little loose.
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paulmarshall Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 1268 Carterton,New Zealand Gender:	Re: Odd clack noise Reply #5 - 04/21/13 at 12:16:08 I had to google Piston Skirt. Very interesting reading. http://www.wisegeek.com/what-is-a-piston-skirt.htm
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Mal

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Re: Odd clack noise
Reply #6 - 04/21/13 at 14:48:03

okay, I'm going to check the piston and spark plug this weekend. the bike still has good power. but i do notice a hesitation if i try a full throttle run through multiple gears. As i shift into the next gear, the bike acts as if it loses fuel or spark. but the bike has very healthy power through the power band. just when i get in the next gear dies for a second and then comes back.

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Serowbot

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OK.... so what's the
speed of dark?

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Re: Odd clack noise
Reply #7 - 04/21/13 at 15:48:17

Before you go digging deep,... replace that exhaust gasket...
I think that may be all it is... without a leak up there, you will get a sharp, "kak, kak" sound, that sounds serious...

Also, make sure your idle speed isn't too low... this ain't a Hog... it shouldn't sound lumpy.... a smooth and even purr... 900 to 1100rpm...

EDIT.. I meant..."with a leak up there"... Grin

...

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« Last Edit: 04/21/13 at 18:22:03 by Serowbot »

Ludicrous Speed !... ... Huh

...

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Mal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 9	Re: Odd clack noise Reply #8 - 04/21/13 at 15:52:56 could the idle speed be what is causing it? it does sound a bit low.. I will get on the exuast mani gasket!
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Odd clack noise Reply #9 - 04/21/13 at 19:48:35 If you think it sounds even ANY low, jack it up
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Mal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 9	Re: Odd clack noise Reply #10 - 04/21/13 at 20:29:56 will do. has anyone ever had a rod knock that they could not hear when they put a stethoscope/screwdriver to it?
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Mal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 9	Re: Odd clack noise Reply #11 - 04/23/13 at 05:53:21 I was doing some reading and realized i used 10w 30 oil. could that cause a knock?
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apache snow-FSO

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Re: Odd clack noise
Reply #12 - 04/23/13 at 06:55:40

If you used 10W30 automobile oil it is NOT compatible with your wet clutch. It is WAY too low in anti wear additives and the viscosity is too thin.

Change it out for a motorcycle (jaso ma) approved 10W40. Rotella 15w40 or if you like synthetic 5W40 both work well and are on the forum approved list.. Although some say the 5W40 does shear down some in a shared engine trans oil. If you want to spend a little more, Mobil 1 4T racing motorcycle oil is good as well.

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2012 Honda Shadow Spirit

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Mal YaBB Newbies Offline SuzukiSavage.com Rocks! Posts: 9	Re: Odd clack noise Reply #13 - 04/23/13 at 07:08:17 okay. I'll do that this weekend
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bill67 Serious Thumper Offline old tired Posts: 8517 genoa city wisconsin Gender:	Re: Odd clack noise Reply #14 - 04/23/13 at 09:11:10 you need a 4T oil Klotz or Mobil one are motorcycle oils and are 4T oil.
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