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Throttle Slide Small Screws holding needle - cant get out - screw head bu******

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paulbaker1954:
I need to change circlip position on my needles but one of the small 3mm screws is rounded off. The one right at the bottom.

I could try and drill the head off but I am a bit reluctant to put the slide  in a vice in case I squeeze to hard and damage the slide. The slides are not cheap to replace methinks

Any other bright ideas !!ideas !!

totty:
Get a set of rubber vice jaws. That screw is in such an awkward place I can't think of any solution other than drilling it.

Gixxer-18:
Get a left handed drill bit. As it bites it will wind out the screw.

andut:
Paul,

I did the same at the weekend and had a similar problem with one of those little inaccessible screws.  You may find a very sharp tap with the sharpest screwdriver that  you can find may free it off - worked for me.  I sat the slider on top of plenty of rags to protect the lower chamfered edge of the slider and then through an open vice to support it before giving it a tap.

Hope you get it sorted - raising the needles on my 400 by 1 step really helped to improve the mid range and allowed me to lean off the air screw to improve idle.

Andy

keithK2:
Paul,
I have had some success with a long-nosed pair of mole-grips. If one screw is removed you can turn the needle holder slightly to (sometimes) free the screw the other stuck screw.

Good luck,

Keith

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