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Irregular idling Weber http://ducatipaso.org/forum/viewtopic.php?f=1&t=7271 |
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Author: | Brutus [ Sun Sep 27, 2015 9:05 pm ] |
Post subject: | Irregular idling Weber |
Gents, again I can use some advice. In the last couple of weeks I took the paso apart to install hc pistons (1mm squish ![]() Now i have a bit of a challenge on idle. When the bike is on its centerstand and running idle there is not a problem. Reacts well on throttle, especially with the 40% lighter flywheel ![]() Seems to be the Weber. The idle mixture screw is 4,5 turns out. Any less and the symptoms get worse. I tried larger idle jets, but still it needs 4 or 4,5 turns out. Btw it is the dcnf44 112 model.. Any ideas? Float level? Tx again |
Author: | higgy [ Sun Sep 27, 2015 10:01 pm ] |
Post subject: | Re: Inregular idling Weber |
check the needle and seat for leaking, if you are sure it is not leaking try lowering the float a little and do a good sync |
Author: | Brutus [ Mon Sep 28, 2015 4:50 am ] |
Post subject: | Re: Irregular idling Weber |
tx Higgy, first thing I will look at. Léon |
Author: | paso750 [ Mon Sep 28, 2015 10:23 am ] |
Post subject: | Re: Irregular idling Weber |
Leon, did you calculate the actual compression ratio? Also while you replaced ignition parts did you check the voltage at the coils and CDI units? Original silencers & airbox/filter? What spark plugs are you using? G. |
Author: | Brutus [ Mon Sep 28, 2015 2:23 pm ] |
Post subject: | Re: Irregular idling Weber |
Hi Gerard, I have used the original Borgo pistons that came with the first 750paso's. Had it lying around, low milage with matching cilinders. First installed it without the base gasket and measured squish. This wasn't enough and with 0,3mm gaskets I've reached 1mm squish all around for the two cilinders. Compression ratio should be near 1:10.5 and 1:11. Don't have the equipment to measure, but it should be fine. My paso is the cali type with the digiplex and the single sensor in the alternator cover. Installed two coils of an 916 that were also lying around. Read somewhere they are interchangeable due to the digiplex system. Don't know for certain if I checked voltage on both sides. Will do that soon. Got two open laser exhaust pipes and the k&n filter (56-1120) on the Weber. I changed the spark plugs from iridium types to normal ones dcpr8e. |
Author: | higgy [ Mon Sep 28, 2015 4:05 pm ] |
Post subject: | Re: Irregular idling Weber |
remember when you are syncing, use only one bleed screw leave the other closed The ones on the side of the carb not the mixture screws |
Author: | Brutus [ Mon Sep 28, 2015 4:16 pm ] |
Post subject: | Re: Irregular idling Weber |
Tx Higgy. Normally I use an analog instrument to do this. Now I am considering the transparant tubing with colored fluid that is mentioned in the 906 tuning article. I let you know and post some pics if I can find the time ![]() Léon |
Author: | Frank.61 [ Mon Sep 28, 2015 6:50 pm ] |
Post subject: | Re: Irregular idling Weber |
Hi Léon, Detail: why didn't you use the iridium spark plugs anymore? ![]() Frank |
Author: | Brutus [ Mon Sep 28, 2015 7:12 pm ] |
Post subject: | Re: Irregular idling Weber |
Author: | Brutus [ Mon Sep 28, 2015 9:18 pm ] |
Post subject: | Re: Irregular idling Weber |
While I am at it, I would like to replace the needle valve. Can't seem to find part numbers of a Grose Jet that would fit. Right length and same thread. Anyone? Tx. Léon |
Author: | higgy [ Mon Sep 28, 2015 9:24 pm ] |
Post subject: | Re: Irregular idling Weber |
D & G Valve Manufacturing Co Inc Valves-wholesale Address: 8 Mt Vernon St, Stoneham, MA 02180 Phone:(781) 438-1789 |
Author: | jayh [ Tue Sep 29, 2015 9:39 am ] |
Post subject: | Re: Irregular idling Weber |
Hi Leon , read what I had to say about the idle adjustment in weber what if cheers Jay |
Author: | higgy [ Tue Sep 29, 2015 11:15 am ] |
Post subject: | Re: Irregular idling Weber |
Author: | Brutus [ Thu Oct 01, 2015 6:07 pm ] |
Post subject: | Re: Irregular idling Weber |
Gents, tx for the replies. Higgy, I can't find any mailadres or website of this supplier. Is it possible to have an article number or such, so I can find it here in Europe..? Need one in a couple of days if possible. Found one on a maserati site, but they will charge $40usd for shipping. No way I'm paying this amount for something that'll be shipped for perhaps $4usd.. |
Author: | Brutus [ Fri Oct 02, 2015 6:03 am ] |
Post subject: | Re: Irregular idling Weber |
Maybe some dimensions, if possible..? Length jet, diameter of the thread and the pitch..? |
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