Idling Mayhem! And That's Just the Start of It! - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 16 (permalink) Old 07-05-2009, 10:25 PM Thread Starter
 
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Idling Mayhem! ++AUTHOR UPDATED++

Ok. Things I'm looking at to solve here. And I have video of everything I'll cover.

1. Idling Problem (in the video below)
2. Tapping sound in the motor area. (in the video below)
3. Popping/backfire from the exhaust. (in the video below)
4. Dirty NEW spark plugs (pics below)

Things to consider.

- Bought it used so I'm just dealing with all this - and I'm a beginner
- All spark plugs are sparking and all caps are sparking plugs.
- Spark plugs are NEW - the ones in it before were BLACK! (pictures of new ones below)
- I cleaned the carbs (will clean again if needed!)
- Air jet is turned -360 degrees from all the way IN - that's a full turn
- There is NOTHING attached to the t-connector of the vents on top of the carb (see video 1) - I can't see where it goes.

So here is the vid of me starting and getting the bike warmed up.

http://www.thethinkswitch.com/bike/Fun_With_Fuel01.mp4

Here is this vid of me starting the bike again after a short visit to the store. On the road I had turned the idle juice up (more throttle).

http://www.thethinkswitch.com/bike/Fun_With_Fuel02.mp4

So after that vid - when I hit the road - I'm about to get home and about 100 yards till then it just dies. I neutral all the way in... I tried turning it over again and no go - put it on reserve, no go.

I screwed the air jets back in then turned them out -900 degrees (2.5 full turns). Charged the battery a little - waited - it started again - then it dies about a 1/4 mile out.

Won't start again. Still in reserve and it won't start but is turning (maybe I didn't wait long enough). I get back and it won't start. Charge the battery for a half hour and it starts... GRRR!!! So maybe there's also something draining my battery..........

Here are the spark plugs! (these are NEW):
FRONT:



BACK (notice the wetness on one of them..)



Last edited by SyntaxJO; 07-12-2009 at 11:48 PM. Reason: Big Update
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post #2 of 16 (permalink) Old 07-05-2009, 10:34 PM
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1. Idling Problem Did you try to adj idle?
2. Tapping sound in the motor area. Very likely the acct's check vulcan verses.
3. Popping/backfire from the exhaust. Normal if it is on decceleration.
4. Spark plug crap. Not sure what crap you talking about.

In the first picture, how did you stick the plugs into the concrete?

02 honda sabre 1100
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post #3 of 16 (permalink) Old 07-05-2009, 10:42 PM Thread Starter
 
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It looks like it's stuck in the cement doesn't it, heh heh.... I edited the post to reflect that the spark plug crap is the crap on the spark plugs (in the pictures). Blackness - wetness - browness, lots of nesses. For new plugs it seems like they don't look normal. Like I said the ones before were BLACK.

Hey, did you get a chance to watch the vids? I adjust the idles all over town. It just won't stay. I'm constantly adjusting the idle. The vid also has the tapping noise in the motor.

Last edited by SyntaxJO; 07-05-2009 at 10:44 PM.
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post #4 of 16 (permalink) Old 07-05-2009, 10:48 PM
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For some reason I could not load them.
The accts are ussually the noise maker.
Looks like too much fuel going into the cylinders. Floats too high or bad valve seats.
Also check the charging system for proper charge.

You will get more help from some here that work on this bikes a good bit.

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post #5 of 16 (permalink) Old 07-05-2009, 11:03 PM
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The "T" has a hose that plug behind the right ear. Cut the end of the hose at an angle so that it does not bottom out.
The fan will not come on until the bike it rather hot. You can test by disconnecting the fan switch under the left side of radiator and grounding it.
Check for air leaks between the carb and head.

I got the vd loaded.

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post #6 of 16 (permalink) Old 07-05-2009, 11:30 PM
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From listening to your engine ,the noise I hear is loose cam chains. you need to look in the verses and see how to do the grambo trick to see if the noise goes away,you did not say how many miles ,or I didn't catch it ,your bike has,anyhow if the grambo trick works and it is just temporary,you need to either rebuild your ACCT's or Install manual Cam chain tensioners ,until you get your valve timing steady,you will be plagued with poor driveability issues,and that will get rid of the noise in your engine also




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post #7 of 16 (permalink) Old 07-05-2009, 11:40 PM Thread Starter
 
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niterider - what do you mean by bottom out? And the right ear is the right air filter box? Also - the fan motor is going but the fan isn't connected - I prolly just have to stick it on there and bind it with something.

denny6006 - "until you get your valve timing steady" - how would one steady one's valve timing. Is this something that happens when you break a bike in?

I have less than 17,000 miles on the bike

Last edited by SyntaxJO; 07-05-2009 at 11:42 PM.
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post #8 of 16 (permalink) Old 07-06-2009, 12:32 AM
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From looking at you plugs I.E. electrode, ceramic and ground three of them are the color they should be, tanish/brown. The fourth that looks wet and washed I will guess came from the right rear. You probably need a new coil, set your pilot screws a 2.5 turns from closed.

Install TOC ACCT springs or replace them with MCCT's to eliminate cam chain noise.

As I said before epoxy your fan blade to the shaft or replace the fan, If you need a good fan/motor assy. I have one.

Have the carbs been cleaned, and are the boot clamps tight?

What condition are the air filters?

Have you tried Seafoam?

What grade of fuel are you using?


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Last edited by lance328; 07-08-2009 at 07:16 AM.
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post #9 of 16 (permalink) Old 07-06-2009, 01:49 AM Thread Starter
 
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Carbs were cleaned - I will clean again. Haven't used sea foam - but I JUST poured in what was available from auto-zone. I am replacing the coasting richener diaphragms and waiting for those - the ones I have now arent ripped or holey - they just look warped and "ribboned" up. I don't know if you watched the vids - but I have a gas leak too it seems.
So you think i need a new coil eve though it's firing?? I will admit it seemed the left side was firing better...

Last edited by SyntaxJO; 07-06-2009 at 02:37 PM.
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post #10 of 16 (permalink) Old 07-07-2009, 02:29 AM
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Quote:
So you think i need a new coil eve though it's firing??
It is the same coil feeding both plugs, so I think it is unlikely that the coil is faulty. It is more likely that you actually don't have a spark on the other plug when it is installed in the engine. Clean up the coil and the plug wires/caps real good and if that does not help, try new plug wires/caps before buying a new coil.
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