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Author Topic: bottom end knock  (Read 4088 times)

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EAGLE1

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bottom end knock
« on: October 03, 2006, 08:50:56 PM »

Just got my bike back from the 5k service and hit road with a bunch of friends for a beautiful fall ride in the Kettle Moraine Valley of Wisconsin. Everything was going smooth and we were enjoying a great 75 deg. day. Then we came to a stop and out of no where I hear the dreaded bottom end knock, I just freaked, not believing what my ears were hearing, I motioned my group to pull over and we pulled into one of the state rec. areas to investigate the situation. We all stood around listening to the motor and I got as many opinions as we had assholes. We Brainstormed everything from bad fuel, over filled oil, bad spark plug or ignition misfire, and one guy even suggested that someone could have messed with the timing during my 5k service. I immediately bypassed all the simple, easy-to-fix inexpensive problems and convinced myself that I had a wrecked motor. I did the slow burn all the way home wondering how the hell this could have happened to my bike, but the long and short of it is that in most cases, the culprit is something else entirely, as I found out.

Brought the bike back the dealer and told him the problem. they checked the plugs, and breather and even took out about a 1/2 quart of oil that was over the full mark, but didn't hear the noise I was hearing and gave me the bike back and sent me on my way. Well, I took the bike down the road for a test drive and the first stop light I hit, boom there was the knock again. turned around and went right back to the shop. pulled up and the service tech was standing right there having a smoke. I called him over and said listen to the motor, he leaned over took an earful looked up and said sounds like you got a loose compensator nut, hell its under warrantee relax, go have a beer in the diner and I'll call you when it done, he tells me.  He called it on the money, the bottom end knock was due to a loose compensator nut. So, when this assembly malfunctioned, the accompanying noise transfers along the sprocket shaft into the bottom end, leading the me to think the worst and therefore causing the insidious knock. lesson I learned this week, Check the simple and inexpensive things first and don't over react and jump to conclusions.
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Twolanerider

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Re: bottom end knock
« Reply #1 on: October 03, 2006, 09:27:09 PM »

Quote
Just got my bike back from the 5k service and hit road with a bunch of friends for a beautiful fall ride in the Kettle Moraine Valley of Wisconsin. Everything was going smooth and we were enjoying a great 75 deg. day. Then we came to a stop and out of no where I hear the dreaded bottom end knock, I just freaked, not believing what my ears were hearing, I motioned my group to pull over and we pulled into one of the state rec. areas to investigate the situation. We all stood around listening to the motor and I got as many opinions as we had assholes. We Brainstormed everything from bad fuel, over filled oil, bad spark plug or ignition misfire, and one guy even suggested that someone could have messed with the timing during my 5k service. I immediately bypassed all the simple, easy-to-fix inexpensive problems and convinced myself that I had a wrecked motor. I did the slow burn all the way home wondering how the hell this could have happened to my bike, but the long and short of it is that in most cases, the culprit is something else entirely, as I found out.

Brought the bike back the dealer and told him the problem. they checked the plugs, and breather and even took out about a 1/2 quart of oil that was over the full mark, but didn't hear the noise I was hearing and gave me the bike back and sent me on my way. Well, I took the bike down the road for a test drive and the first stop light I hit, boom there was the knock again. turned around and went right back to the shop. pulled up and the service tech was standing right there having a smoke. I called him over and said listen to the motor, he leaned over took an earful looked up and said sounds like you got a loose compensator nut, hell its under warrantee relax, go have a beer in the diner and I'll call you when it done, he tells me.
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EAGLE1

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Re: bottom end knock
« Reply #2 on: October 03, 2006, 11:21:56 PM »

Quote

It's not an uncommon weakness Eagle.
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cuthbertss

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Re: bottom end knock
« Reply #3 on: October 03, 2006, 11:23:37 PM »

Quote

Thanks twolane, it was a tough weekend, lots of stress considering the day before (saturday) the tranny in my dodge puked all over the highway, that would have added insult to injury.
makes my chitty weekend seem tame by comparison.... [smiley=nixweiss.gif]
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cuthbertss

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Re: bottom end knock
« Reply #4 on: October 03, 2006, 11:26:13 PM »

Quote
Just got my bike back from the 5k service and hit road with a bunch of friends for a beautiful fall ride in the Kettle Moraine Valley of Wisconsin. Everything was going smooth and we were enjoying a great 75 deg. day. Then we came to a stop and out of no where I hear the dreaded bottom end knock, I just freaked, not believing what my ears were hearing, I motioned my group to pull over and we pulled into one of the state rec. areas to investigate the situation. We all stood around listening to the motor and I got as many opinions as we had assholes. We Brainstormed everything from bad fuel, over filled oil, bad spark plug or ignition misfire, and one guy even suggested that someone could have messed with the timing during my 5k service. I immediately bypassed all the simple, easy-to-fix inexpensive problems and convinced myself that I had a wrecked motor. I did the slow burn all the way home wondering how the hell this could have happened to my bike, but the long and short of it is that in most cases, the culprit is something else entirely, as I found out.

Brought the bike back the dealer and told him the problem. they checked the plugs, and breather and even took out about a 1/2 quart of oil that was over the full mark, but didn't hear the noise I was hearing and gave me the bike back and sent me on my way. Well, I took the bike down the road for a test drive and the first stop light I hit, boom there was the knock again. turned around and went right back to the shop. pulled up and the service tech was standing right there having a smoke. I called him over and said listen to the motor, he leaned over took an earful looked up and said sounds like you got a loose compensator nut, hell its under warrantee relax, go have a beer in the diner and I'll call you when it done, he tells me.
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EAGLE1

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Re: bottom end knock
« Reply #5 on: October 04, 2006, 12:53:25 AM »

Quote
Oh by the way....
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Twolanerider

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Re: bottom end knock
« Reply #6 on: October 04, 2006, 02:54:49 AM »

Quote

cuthbertss, thanks, it is tough to hear especially over my big shots, you can barley have a normal conversation standing next to the bike not alone hear a faint knock, but I felt it in the handle bars at idle as well, and as im sure you know after spending so much time with your baby you become quite attuned to her every whimper.
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cuthbertss

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Re: bottom end knock
« Reply #7 on: October 04, 2006, 07:41:33 AM »

Quote

So Eagle, since Scot's actually tore up a stator and other greasy pieces and you got out relatively unscathed I guess that means his nuts were looser
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Fired00d

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Re: bottom end knock
« Reply #8 on: October 04, 2006, 01:17:49 PM »

FYI - Here is the service bulletin concerning the Compensator Nut...

 [smiley=pumpkin.gif]
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 [smiley=fireman.gif]
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Twolanerider

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Re: bottom end knock
« Reply #9 on: October 04, 2006, 03:47:46 PM »

Quote
FYI - Here is the service bulletin concerning the Compensator Nut...

 [smiley=pumpkin.gif]
Ride Safe,
Fired00d
 [smiley=fireman.gif]


Wouldn't you know.  Two perfectly well meaning people try to legitimately derail a perfectly derailable thread with testicle jokes and a moderator has to post something serious.  Well nuts!
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EAGLE1

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Re: bottom end knock
« Reply #10 on: October 04, 2006, 05:04:16 PM »

Quote


Wouldn't you know.
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Fired00d

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Re: bottom end knock
« Reply #11 on: October 04, 2006, 05:12:31 PM »

Quote
.....

dood, by the way, where do you find that stuff
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cuthbertss

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Re: bottom end knock
« Reply #12 on: October 04, 2006, 05:14:00 PM »

Quote
Information came from CVOHarley. [smiley=drink.gif] Can't remember if someone had posted it before or I got it off the website that used to have all those service bulletins.

 [smiley=pumpkin.gif]
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it was most definitely on here..i got it exactly 2 days AFTER mine disintegrated [smiley=nixweiss.gif]
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Fired00d

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Re: bottom end knock
« Reply #13 on: October 04, 2006, 05:14:30 PM »

Quote
Wouldn't you know.  Two perfectly well meaning people try to legitimately derail a perfectly derailable thread with testicle jokes and a moderator has to post something serious.  Well nuts!
I learned it all from you. ;) Throw in some useful/pertinent information with all the BS and everybody is happy. [smiley=huepfenjump3.gif]

 [smiley=pumpkin.gif]
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Fired00d
 [smiley=fireman.gif]
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110tHunDer

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Re: bottom end knock
« Reply #14 on: October 04, 2006, 07:18:41 PM »

 
Yesterday a porous head, today an improperly torqued compensator nut.  What other problems have we discussed on here that are going to show up on my bike tomorrow? [smiley=nervous.gif]

Big thumbs up [smiley=xyxthumbs.gif] to Brian, the service tech at Bumpus H-D in Memphis, TH, for catching both of these issues while working on my bike!

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