Pilot Jet circuit blocked bizarely

[kfz]

I seem to have an oring or a washer stuck on the pilot, (PHF36)  how does this happen and how the hell does it come out,  the same way it went in i guess......

Anyone seen this before?

Kev

pic2 shows it at the bottom of the channel, Pic1 shows it pulled up but unable to clear the threads (for the pilot jet). 

[John A]

I’ve never seen that one before. Maybe they found a place for the extra orings in the kit, harhar.
Did you get it out? I was thinking if compressed air didn’t do the trick, a pin with the end bent might snag it.

[SED]

Yeah, they get stuck.  I've been able to get some out and others not.  Most carbs (older Dellorto, Mikuni, Amal) don't have o-rings to seal the idle screws, instead they rely on the fine threads sealing so I didn't worry about the old o-ring too much.  Apologies for stating the obvious - the area between the tapered tip of the screw and the tapered seat meters the fuel.  Any air leaking down the threads of the idle screw can easily be accommodated by turning the screw out a little more. It least that's how I handled it...
 

[Fontain25]

I straighten a paper clip out and put a very tiny [1mm?] 90* bend on the end with pliers and then use it to "fish" such things out.

[John A]

Yeah, they get stuck.  I've been able to get some out and others not.  Most carbs (older Dellorto, Mikuni, Amal) don't have o-rings to seal the idle screws, instead they rely on the fine threads sealing so I didn't worry about the old o-ring too much.  Apologies for stating the obvious - the area between the tapered tip of the screw and the tapered seat meters the fuel.  Any air leaking down the threads of the idle screw can easily be accommodated by turning the screw out a little more. It least that's how I handled it...

This o ring is in the idle jet passage, not in the idle mixture hole the way I understood it.

[John A]

I straighten a paper clip out and put a very tiny [1mm?] 90* bend on the end with pliers and then use it to "fish" such things out.

That may be too large for this one.

[kfz]

Thanks guys,  try an answer all these.

1.  No i cant get it out,  its solid , its not an oring,  looks like a washer or broken end of pilot jet.  I can move it up and down (its tight) within the passage (ooh er vicar) but it cant pass out through the threads its too large.
2.  Yes its in the pilot jet passage.  I have no idea how it got in there.
3. The bike wont idle, drops to 1 cylinder and dies.  Bikes unrideable on road.  runs fine off idle.
4.  ive tried all kinds of probes, wires and compressed air. its physically to big to come out.

I'll take it for a second opinion today.  i have some tiny lock picks maybe we can rotate it out. 

I must come clean at this point but the Delly is off a Ducati (I know, what am i thinking)  so is the push on metal intake type and are virtually unobtainable in UK.  So i need to save the carb.  Not easily replaced.

Kev

[Scout63]

Can you tell if it is rubber or metal?  If rubber, maybe a little heat to soften it  I keep a set of cheap dental type picks around for these jobs.

[kfz]

Can you tell if it is rubber or metal?  If rubber, maybe a little heat to soften it  I keep a set of cheap dental type picks around for these jobs.

I think its a broken piece of pilot jet.    maybe a tiny EAZY out can grip and wind it out.  Failing that i think it will need to go in the drill press and be drilled out as best it can and hope the remnants dont impede flow.

[Ratso88]

If it comes down to drilling, a left hand twist drill bit would be preferred. Of course your drill would require a reverse gear.

Aerokroil, some heat and the left hand bit. Patience with a soft touch.

McMaster Carr would be my first choice on the drill bits.

[n3303j]

Rebuild video:  http://tinyurl.com/4syt574n

Looks like you have the body of a jet broken off in the casting. That should be a threaded hole.

The video (in German, sorry) gives nultople quick views of the bare body of the carb. If you scrape the hole a bit you should see brass.

Maybe Kroil, heat and an EZ-Out might clear the passage.

[kfz]

Rebuild video:  http://tinyurl.com/4syt574n

Looks like you have the body of a jet broken off in the casting. That should be a threaded hole.

The video (in German, sorry) gives nultople quick views of the bare body of the carb. If you scrape the hole a bit you should see brass.

Maybe Kroil, heat and an EZ-Out might clear the passage.

I believe you are correct.   The idea is is to sacrifice a jet as a guide.  Fit the drill out jet as central guide and dril down 3.8mm right through the obstruction.  Hopefully weakening it sufficently or remove it as an obstruction.

Ive left it with my Dad to sort out,  what are Dads for?

Kev

[SED]

Ah, I did have it wrong!
However, now I think it is the broken end of the "emulsifier" that is sometimes inserted before the idle jet. (#4 and 5 in the picture below) I had one broken off like that and I was able to get it out probably with a tiny easy-out or left-hand drill bit as suggested.  Guzziology references the emulsifiers and suggests they are optional.
Somewhere I should have a picture of the broken one I pulled out, but can't find it - it was about 15 years ago!
It is removeable - good luck.