Starting up carb’d monster after 5 years

[joshuajcrouch]

maybe some FCRs will solve the problem?

Haha I wish.  Unfortunately I am on a LIMITED budget.  I gotta make these stock carbs work.

I think we both did.

So is that the consensus then?  Somehow the drain screw isn't sealing correctly?  Its only dripping out of one side despite if I move the drain screws from one side to the other.  It also only drips if I have a fuel source hooked up to the fuel pump (even with the bowls full).  Wouldn't it just drip all the time then?

That makes me think that maybe the bowl cover is compromised.  The Tech mentioned pitting at the bottom of the float bowl.  Does anyone have any extra bowl covers that they want to sell me?

[joshuajcrouch]

So I called up the Tech this morning and explained to him that the dripping stops when I disconnect the fuel source from the pump and let the bike run off the fuel in the bowls, and he now thinks that its the float height that is the issue.

This is so confusing.

Either way he agreed to look at the carbs again for me.  So looks like I will be tearing things apart again on Saturday.  Atleast now I am familiar with the bike and can do it in half the time it took me the first time.

[dlearl476]

This is so confusing.

Either way he agreed to look at the carbs again for me.  So looks like I will be tearing things apart again on Saturday.  Atleast now I am familiar with the bike and can do it in half the time it took me the first time.

The one benefit of doing work yourself is the learning experience. Looks like you're getting plenty. Glad the tech agreed to re-visit his work. Everything you describe points to either the float height or the needle seat in the offending carb not being right.

[joshuajcrouch]

The one benefit of doing work yourself is the learning experience. Looks like you're getting plenty. Glad the tech agreed to re-visit his work. Everything you describe points to either the float height or the needle seat in the offending carb not being right.

Yeah you are totally right.  I was blown away by how quickly I can remove the carbs now.  I was able to pull off the battery, ignition, airbox, and carbs in 45 minutes.

I removed the carbs yesterday and dropped them off this morning with the Tech.  Sure enough it was the needle not seating correctly.  He figured it out and fixed it without charging me extra.

Next step is to put everything back together again and see how she runs.  Thanks for the support everyone!

[joshuajcrouch]

Good news!  She finally runs and NO drips out of the overflow.

I am having some inconsistent / lumpy idle symptoms during the cold start, but I am assuming that can be resolved once I get around to doing some carb tuning.  I am guessing some things to check would be synchronizing the carbs and maybe fuel mixture ratio?

Also, where would one go to get vacuum nipples for the intake runners?  reading up now on how to synch my carbs.

[koko64]

Yes, those two things.
There are many threads on doing those jobs too.
Good work, you have a good baseline. Dont make any judgements about how well it idles and runs down low until the choke is off and its well warmed up to operating temps.
Assess its idle quality after a decent ride and tune from there.

[joshuajcrouch]

Hey everyone...
So I need to synch my carbs next.  Turns out I need the threaded vacuum nipples for the intake runners so I can hook up some vacuum gauges to my bike.

I posted in the "parts wanted" forum here but I am not getting any looks.  I also called the local Ducati dealership and it turns out that this part is no longer available from the factory.

Does anyone have any that they could sell me?  I would ideally like to get (2) threaded nipples.  Also, anyone that removed their emissions system from their bike should have some extra threaded nipples left over from the charcoal canister.  Please help!

Joshua

[Ddan]

Bonus useless extra parts included

http://www.ebay.com/itm/116-07-Ducati-Monster-620-M620-intake-manifold-boot-/290663912555?pt=Motorcycles_Parts_Accessories&hash=item43aceb546b&vxp=mtr

http://www.ebay.com/itm/DUCATI-MONSTER-S2R-800-ENGINE-INTAKE-BOOTS-BOOT-SENSOR-/270691962003?pt=Motorcycles_Parts_Accessories&hash=item3f067f8c93&vxp=mtr

http://www.ebay.com/itm/DUCATI-EFI-Fuel-Intake-manifolds-from-Monster-ST2-SS900-/360637566284?pt=Motorcycles_Parts_Accessories&hash=item53f7ac8d4c&vxp=mtr

[joshuajcrouch]

Bonus useless extra parts included

http://www.ebay.com/itm/116-07-Ducati-Monster-620-M620-intake-manifold-boot-/290663912555?pt=Motorcycles_Parts_Accessories&hash=item43aceb546b&vxp=mtr

http://www.ebay.com/itm/DUCATI-MONSTER-S2R-800-ENGINE-INTAKE-BOOTS-BOOT-SENSOR-/270691962003?pt=Motorcycles_Parts_Accessories&hash=item3f067f8c93&vxp=mtr

http://www.ebay.com/itm/DUCATI-EFI-Fuel-Intake-manifolds-from-Monster-ST2-SS900-/360637566284?pt=Motorcycles_Parts_Accessories&hash=item53f7ac8d4c&vxp=mtr

Ahhh... I never considered ebay.  Do you think the threaded vacuum nipples for the EFI are the same specs as the carb'd ones?

Thanks for the recommendation.

[garryc]

[urlhttps://store.bevelheaven.com/workshop-tools/intake-manifold-adapter-w/cap-5mm-brass/][/url]

[urlhttp://www.motionpro.com/motorcycle/partno/08-0218/][/url]

[joshuajcrouch]

[urlhttps://store.bevelheaven.com/workshop-tools/intake-manifold-adapter-w/cap-5mm-brass/][/url]

[urlhttp://www.motionpro.com/motorcycle/partno/08-0218/][/url]

Yes!  Thanks man you rock!

Just placed an order with Motion Pro for some threaded nipples and a manual petcock.  Wow that sounds dirty.

[joshuajcrouch]

OK I really wish I could let this thread die... but I keep need your valuable input!  I have been working on tuning my carbs and I think my bike is running to lean because:

• Won't idle without stalling out when cold
• Once warmed up it will idle but stutters when "blip"ing the throttle
• Fuel/air mixture screw set at 3 rotations out

I played with the fuel/air mixture screws to see how the motor responded to running more rich.  The bike seems to be the most happy at 6 rotations out.

The Ducati Tech said that when I brought the carbs in the first time to get serviced, the mixture screws were set at 5 rotations out.  Most likely the bike came from the dealership this way since it only has 900 miles on it, and the original owner didn't modify the bike at all.

Is 6 rotations too many?  Any harm in running the bike long term this way?

Joshua

[ducpainter]

There is no harm running it that way, but...

you could use larger pilot jets.

[joshuajcrouch]

There is no harm running it that way, but...

you could use larger pilot jets.

Ok good to know.  I am wondering if the bike is running rich enough even at 6 rotations.  The bike seems happy, although I can't seem to smell any fuel coming from the exhaust.

Using the stock air box, with chopped/cored OEM exhaust.

[ducpainter]

Ok good to know.  I am wondering if the bike is running rich enough even at 6 rotations.  The bike seems happy, although I can't seem to smell any fuel coming from the exhaust.

Using the stock air box, with chopped/cored OEM exhaust.

If the airbox is stock, cored cans shouldn't affect things. If more air can't get in then the mixture doesn't change.

Monsters were always lean with stock jetting.