Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > For Ghosty / Kev / anyone DD Mechanic. question

[Ghost]

Hi Craig, not normal, front pot is not firing correctly.
Firstly swap spark plugs, if it was running ok prior to this then we can rule out compression prob.

The next thing to do then is swap the coils/igniters from cyl to cyl and see if the problem moves to the back cylinder.

I doubt if its fuel unless its been upside down somewhere.

[Gbyte666]

Thx Phil, I forgot to say I put another plug in the front one.
I'll go swap over the coils/igniters

Craig

[Gbyte666]

OK, I swapped over the coils/igniters, Same runs freely on the rear on it own, but not without a bit of revs on the front on its own.
Front header pipe did seem a little hotter ( maybe my imagination ) but still no where near making water boil on contact like the rear one does.

Craig

[Ghost]

Originally Posted by Gbyte666

OK, I swapped over the coils/igniters, Same runs freely on the rear on it own, but not without a bit of revs on the front on its own.
Front header pipe did seem a little hotter ( maybe my imagination ) but still no where near making water boil on contact like the rear one does.

Craig

Mmm, if you have a meter to measure the pickup coils resistance ought to be 95 to 105 Ohms.

Just to check if its fuel with the air filter out put some fuel in a houshold spray bottle, then whilst its running mist some fuel straight into the throat of the front cylinder carb and see if it makes that cylinder run.

[Gbyte666]

Thx again Phil.. I'll measure the resistance now.
Have to empty the Mrs washing liqid somewhere and put some petrol in it. lol
Errr are the pickup coils the two black things with what looks like a solid fuse in the top of each one or the black box's either side with two white connectors into each ? Lol

Craig

[Gbyte666]

Hmm asumming on on the right thing, going against the two connectors on the black bakelite jobys I get about 7ohms on both of them.
I'll upload a pic to make sure im accoss the right thing.

Craig

[Gbyte666]

Sprayed mist of fuel into the top of the carb, no joy. Here is a pic of what I am mesuring at 7 ohms on a digital meter.