Running on three

[McCabe-Thiele (Ted)]

The restriction I believe is an optical illusion.

[gary123]

Ta guys, Ill get back to it in the morning.

[Bryanj]

There is a "spider" at the top of the jet to help atomisation of fuel

[K2-K6]

I see the same "spider" restriction in them when held up to a light and looking through.

I've used brass wire on a suede brush to go through there as it passes the spider without damage.  Or copper strand from mains flex stripped out, just gently wiggle it through.

Any compressed air use, go backwards through it to dislodge debris as it obviously wouldn't pass through in correct flow direction.

Also it can help leaving it in a pan of boiling water to soften fuel tarring if that's the root cause.

[gary123]

There is a "spider" at the top of the jet to help atomisation of fuel

Thats good, I thought I was seeing things.

[Sesman]

You are. Spider my arse.

[Sesman]

The best way I’ve found to clear idle/ slow jets is to heat in a flame. This turns the resin fuel deposit into ash. I then push a plain wire through the jet (say 0.38mm through a 40# jet). The risk of damaging the jet is absolutely minimal…it’s brass and durable. I wouldn’t use a serrated type cleaner you associate with welding nozzles though. Though to be fair even these would have a hard time causing detrimental damage if used with care and the correct size. Jet cleaning is the easy bit, the internal carb passages are more challenging. Get to understand the three points of entry in the pilot passage ways and block them to force carb cleaner through the various routes. I found my jets were clear, but the passages needed a lot of attention.

[JezzaPeach]

If I curl up my index finger to make a really tiny hole and look close up through it at a light, without glasses on, I can see a sort of web pattern… just an observation!

[Sesman]

 😀😀

[gary123]

You are. Spider my arse.

 

[Laverdaroo]

 

You are. Spider my arse.

 

[McCabe-Thiele (Ted)]

 

I've also seen The Lock Ness Monster so it must be true

[Laverdaroo]

 

[Bryanj]

Genuine pilot jets definately have something near the top so you cant get a wire all the way through, seen it on several but not pattern ones

[Sesman]

Mine are genuine, but don’t.