my 750 engine, help

  • ran429
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my 750 engine, help

21 Feb 2007 20:54
#114326
Here is a crappy video of my engine starting cold, and then running.

You will hear the clunking I am wondering about, there is no picture just darkness and sound though.

[img


Can anyone inform me where to start getting rid of this annoying noise?

As you will see, it goes away at higher rpm, then comes back at idle.

Post edited by: ran429, at: 2007/02/21 23:57

Post edited by: ran429, at: 2007/02/22 00:22

Post edited by: ran429, at: 2007/02/22 01:42

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Re: my 750 engine, help

21 Feb 2007 22:44
#114343
i think the link will work now.

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  • steell
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Re: my 750 engine, help

22 Feb 2007 03:55
#114351
Did you have the microphone real close to the bottom of the motor when you recorded that?

It sounds like the primary chain, but much louder than normal, if you had the microphone right next to the motor then that would explain why it is so loud.

Have you synced the carbs?
KD9JUR

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Re: my 750 engine, help

22 Feb 2007 12:28
#114466
it was above the motor at the clutch handle at first, then i moved it to the motor after it was running for a minute.

it sounds more top end when listening to it, but then it also sounds lower like in the crank case, im not sure. so i posted it here.

I will take another video of it running in daylight some time today.

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Re: my 750 engine, help

22 Feb 2007 13:06
#114484
Sounds like a candidate for exploratory surgery! :unsure: :S 'Course, I'm always looking for an excuse to tear something apart! Here's my guaranty: I'll either fix it, or break it so bad you won't want it back!:woohoo: :woohoo: :woohoo: :woohoo: :woohoo: :woohoo: :woohoo: :woohoo: :woohoo: :whistle:
\'81 GPz 1100 project
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\"Man does not control his own fate. The women in his life do that for him.\" Groucho Marx

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  • Nevco48
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Re: my 750 engine, help

22 Feb 2007 13:19
#114490
ran429 wrote:
Can anyone inform me where to start getting rid of this annoying noise?

That is pretty annoying. Here's what worked for me- I turned this little button all the way to the left.
sorry Randy, just being a d**khead; I've been stuck home all day waiting for the Cable Guy to show. ComCastic, my a$$.:angry:

Post edited by: Nevco48, at: 2007/02/22 16:21

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Re: my 750 engine, help

22 Feb 2007 13:32
#114493
heres a different video just taken this morning.

[img

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Re: my 750 engine, help

22 Feb 2007 13:34
#114495
Nevco48 wrote:
ran429 wrote:
Can anyone inform me where to start getting rid of this annoying noise?

That is pretty annoying. Here's what worked for me- I turned this little button all the way to the left.
sorry Randy, just being a d**khead; I've been stuck home all day waiting for the Cable Guy to show. ComCastic, my a$$.:angry:<br><br>Post edited by: Nevco48, at: 2007/02/22 16:21
big ole glass of Prune Juice will perk you right up. try it ! :whistle:

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Re: my 750 engine, help

22 Feb 2007 13:45
#114497
Thats better with daylight. What is that "squock" noise when you start it? (at 11 seconds.) Is the timing OK?
Those butts are gonna kill ya...

Gotta get back to the peanut gallery.

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Re: my 750 engine, help

22 Feb 2007 15:21
#114534
the sqawk was the starter, i need to take it off and rebuild it as well, so many things to do and so little cash to do it with.

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Re: my 750 engine, help

23 Feb 2007 22:33
#114889
Don't lose sleep about fixing that starter clutch unless it fails, or you are openning up the engine anyway. My daily rider with 97,000 miles has been making this noise for at least 14,000 miles, without getting any worse. Sometimes the cure is more of a problem than the disease.
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Petaluma and Truckee, CA -- member since Jan. 23, 2003;
PREVIOUS KZs: 1980 KZ750H with 108,000 miles; 1980 KZ750E with 28,000 miles; and KZ750H street/cafe project, all sold a few years back.

This is what I do for fun, not for work. It is art, with a little engineering thrown in.

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Re: my 750 engine, help

24 Feb 2007 05:54
#114924
steell wrote:
...Have you synced the carbs?
This sounds like my bikes have sounded when I was rebuilding and the carbs were WAY out of sync or the floats were screwed up, so that the cylinders were fighting each other....
(1.) '75/'76 KZ400D - Commuter
(2.) '78 KZ750B3 Twin - Commuter
(3.) '78 KZ750B3 Twin - Commuter
(4.) '75 KZ400D - Sold
kz750twins.com

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