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1995 M900 CARB HELP!!!

Started by abbottstjumper, July 08, 2009, 05:46:34 PM

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abbottstjumper

July 08, 2009, 05:46:34 PM
OK so I posted a few days ago that I rebuilt my carbs on my M900 and that the bike ran great!!!

http://ducatimonsterforum.org/index.php?topic=26355.0

Well that was until this morning when it died about a mile from my house. I left and it ran fine for the first half mile then started sputtering, back firing and then just died, it started back up and then just died again. I'm wondering if I might have the mixture off or maybe the wrong needle settings. I also noticed a few shims and washers below the jet needle and I'm wondering if thats normal. If any one here has rebuilt their carbs with a factory Jet kit please let me know, I have a few questions.

Also if you have any other recommendations as to what it could be I could use the help. I'm wondering if I should go to a shop and have it tuned, if so where do you recommend? I live outside of Boston, MA, and would like to resolve this ISSUE ASAP.....   ??? ??? ???

HELP, HELP, HELP!!!  ANYTHING WOULD BE GREAT!!!

ducpainter

#1
July 08, 2009, 05:52:02 PM
Do you park it outside?

Did you buy gas at a different station?
"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
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    is even more amazing than yours."
    To realize the value of nine  months:
    Ask a mother who gave birth to a stillborn.
"Don't piss off old people The older we get, the less 'Life in Prison' is a deterrent."


erkishhorde

#2
July 08, 2009, 07:43:16 PM
So you rebuilt the stock Mikuni carbs? I've been tinkering with mine recently too and I'm finding that there are a lot of things that can be done wrong.  [bang] No, I don't think there are any shims under the jet needle. I'm not sure exactly what you mean though. Starting from the fat side of the needle there is a clip followed by a white washer which I guess could be interpreted as a shim and then under that is a metal washer.

Out of curiosity, what's your set up and what jets did you use? I can't tell you if you're right but I'm just curious since I might be doing the same for my bike soon if I can't fix my lean running.

I guess you have no reason to suspect anything between the tanks and the carbs? One problem that I've been having recently is little hose shavings clogging up that last filter at the inlet to the carbs. I have no idea where these shavings are coming from. I replaced all my lines with new hose from Autozone but every time I take off the hose to poke around again there are little black flakes in my fuel lines. Not a whole lot but assuming that the same amount accumulates each time I ride I could see how these flakes could clog the little filter. Today I'm putting on clear hose to see if I can nail this down.

ErkZ NOT in SLO w/ his '95 m900!
The end is in sight! Gotta buckle down and get to work!

abbottstjumper

#3
July 09, 2009, 12:08:05 PM
OK!!!! I'm hoping that unlike most other post I read, this will not come back to haunt me!!

I think I fixed the issue, came down to the carbs being out of sync (used a vacuum gauge to sync), I also moved the jet a notch lower (now 3 from the top) and I also double checked my floats, put it all back together and took her for a spin (pounded on her hard) and no sputtering, no hesitation..... clean sailing!!!

Keeping my fingers crossed!!!


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