UK Karting - Notice Board (Combined Forum) : Re: Idle jet emulsion tube thread size

Notice Board (Combined Forum)

Re: Idle jet emulsion tube thread size
Posted by 'alanrr' on 17 May 2016 @ 10:43

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alanrrJoined: August 2001
Total Posts: 491
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They usually get damaged by using a screwdriver that is tapered and the wider part damages the thread as the jet is screwed in.

Is your jet still in there or is it removed?

The thread is a 5mm 0.8 pitch.

If the jet is still in the carb you will need a tap that is 'stubbed off' so that you can cut right up to the top of the jet(I've got one)as a plug tap still has a small taper on the end.

Even so, there will still be a thread that doesn't get recut and you may still not be able to back the jet out, especially if the slot in the jet is damaged.

With a damaged thread you can fall foul of the regs because you can't get the jet down far enough as there is a measurement to the top of the jet to the body.

A really damaged jet needs to be drilled out to try and save the carb and it's a delicate job if you want to do it properly.

It's worth making a screwdriver that is the right size and thickness to save future grief.

Drop me an email if you're stuck.

alanreynolds48@gmail.com

Message Thread:

Idle jet emulsion tube thread size by 'Hilts' (16 May 2016 @ 21:55)

Re: Idle jet emulsion tube thread size by 'alanrr' << You are here!

Re: Idle jet emulsion tube thread size by 'alanrr' (17 May 2016 @ 10:57)

Re: Idle jet emulsion tube thread size by 'Hilts' (17 May 2016 @ 13:05)

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