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Alright, this has been bugging me for a while. My 749 runs great except it stalls once in a while. Who else's is doing the same thing?
 
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Re: 749/999 stalling poll (Ducatian)

My buddy's brand new 04 S does this at idle speed or at a stop light. Seems unrelated to operating (or ambient) temp or any other identifiable factor.
 
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Re: 749/999 stalling poll (Ducatian)

Well I have a 998 that does it every once in a while. Either at a stop or following a very slow rider spliting traffic will cause the bike to stall(although not repeatable).
 
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mine does it. i've had it at the dealer 3 times, couldn't fix it. the last time i went they just told me "oh, the bike is fine when we test drove it, pick it up", at which point i said screw them and didn't even want to deal wit'em.
 
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Re: (spawn_x)

That happened a few times on a guys bike at work a 2003 749. It turned out to be an intermittent or bad ECU ground.
 
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Re: 749/999 stalling poll (Ducatian)

It was happening to mine so I brought it in to the dealer and they said it was a problem with the throttle bodies, so they cranked up the idle a little bit and it runs fine now, haven't had a stall yet since it's been fixed.
 
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Re: 749/999 stalling poll (Ducatian)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ducatian »</TD></TR><TR><TD CLASS="quote">Alright, this has been bugging me for a while. My 749 runs great except it stalls once in a while. Who else's is doing the same thing?
</TD></TR></TABLE>

Here is the fix:

remove access plugs on the LH side of the airbox (there are two)

Loosen the screws holding the airbox lid on so you can pry open the back of the airbox about 1/2"

Once the airbox is pried open you will be able to see the throttle linkage on the rear throttle body.

There is a 4mm allen set screw for idle speed that points upward toward the LH lower corner on the top of the airbox. Drill a hole so you can adjust this.

Set the air bypass screws all the way in.

Connect vacume balancing guage to the ports on the intakes.

Start motor (it won't want to idle)

Balance TB's with the balance linkage inside the big access port in the airbox.

Set the bypass screws at 3/4 of a turn out.

The bike should be idling at about 1200rpm's

Shut the motor off

Connect the Mathesis to read TPS setting

Back off the idle setting untill there is a gap between the set screw and the tab that it effects (zero idle preload)

What does the TPS read? If it reads zero you will need to wind in the set screw till it treads 2.8+ deg and then re-set the TPS. Now wind the idle back out again.

So now you have a TPS reading of .5+ or so (as long as it's above zero). And the set screw is not touching the linkage.

Take whatever the TPS reading is and add 2.3deg. So if it read .5 and you add 2.3 you come up with 2.8. Wind the set screw in till it reads 2.8deg. Then re-set the TPS. It will ow be assigned a value of 2.3 and you actualy have 2.3 deg on the trottle blades.

Set the trimmer at +20 (this is a starting point for CO's)

Start bike

Play with the air screws till the idle is 1200RPM (the screws should never be more than 1 1/4 turns out).

Recheck balance, TPS setting, CO's

I think this covers it, does it make sense?
 
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Discussion Starter #8
there's only one problem with the fix jason.. we can't do it ourselves, and the ducati techs (at least the ones here) are too snobby to follow a set of directions brought in to them by a customer..
 
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Re: 749/999 stalling poll (Ducatian)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by spawn_x »</TD></TR><TR><TD CLASS="quote">there's only one problem with the fix jason.. we can't do it ourselves, and the ducati techs are too snobby to follow a set of directions brought in to them by a customer.. </TD></TR></TABLE>
Yeah what spawn says !!! we are nobody compaired to the gods at spa & dna

and .. jason .. if you would e-mail every dealer out there with your fix we will make a podium taller than the one Rossi is on . cast your old riding boots in bronze . plus make you a god !!
 
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Discussion Starter #10
emailing is one thing, but they glance over it, chuckle, and throw it in the trash can.

trust me, i bought the printout in last time i went in. i don't think they even got past the first step :rollseyes:
 
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Discussion Starter #11
Re: (spawn_x)

On the ride home from the dealership it happened several times to my '03 749S, but once they put the Power Commander and Termi full system on it, it hasn't happened even one time.
 
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Discussion Starter #12
from what i've heard, the 749S problems come from cam timing, whereas other stalling problems come from a poor TPS adjustment??

for note, i have a termi half system..
 
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Re: 749/999 stalling poll (Ducatian)

I guess I am one of the odd men out.....
I can honestly say that my bike has never stalled other than from something that I have incorrectly done.
I have a 03 999; then again I only have 1900 miles on it. Maybe this problem will show up later as the mileage increases.......I hope not
 
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Discussion Starter #14
I asked this question originally and it happened on the weekend at a set of lights, just sitting there when the temperature hit a 100c, but then again I think the Duke doesnt like to idle in traffic period, especially in the Hot aussie sun(35c).
 
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Re: (YellowWaveRyder)

the '04 749S is unique in that there is a cam timing setting change to fix stalling issues. no other models have had a 'official' fix given. properly set up they don't need it.

re jason's procedure: our 'euro' spec 749 uses 1.4 degrees as the tps idle setting, the 999 uses 2.3 degrees.
 
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Re: (brad black)

jas took care of mine a while back, so it hasn't happened since then but it was a problem when i forst got it (stalling 3 times out of the lot, thought it was me
). now parked in living room awaiting the thaw.
guess the right folks worked on it
 
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Re: (brad black)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brad black »</TD></TR><TR><TD CLASS="quote">the '04 749S is unique in that there is a cam timing setting change to fix stalling issues. no other models have had a 'official' fix given. properly set up they don't need it.

</TD></TR></TABLE>

I goty the cam timing specs also, but we have never had an issue with an "S" if the injection was set up correctly. What have you found?
 
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Re: (section8superbike)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brad black »</TD></TR><TR><TD CLASS="quote">the '04 749S is unique in that there is a cam timing setting change to fix stalling issues. no other models have had a 'official' fix given. properly set up they don't need it.

re jason's procedure: our 'euro' spec 749 uses 1.4 degrees as the tps idle setting, the 999 uses 2.3 degrees. </TD></TR></TABLE>

So, should I use 1.4 or 2.8 degree on my 03 749? Been thinking about fixing it myself since the local dealer here has no balls to admit that they don't know how to do it. Also, if I just want to try my luck on fixing the idle speed first, should I adjust the air bypass screw or the idle speed set screw on the LH corner? The idle speed is not far away from 1200 now, just a bit on the low side. Thanks.
 
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Re: (section8superbike)

every '04 model 749s we've delivered has needed the cam timing done. a couple at the pre delivery, when we've had them stalling on the test ride. change the cam timing - fixed, even without an injection set up. we usually leave that for the first service. don't understand how such a small change can do it, but it's black and white really.

the ecu, when you do the "tps reset", will give a degree setting. that's what we use.
 
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Re: (brad black)

Where can I locate the air bypass screw then? Somebody?
 
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