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Old 30-09-2023, 11:09 AM   #11
350TSS
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Join Date: Jan 2013
Location: Shipbourne
Bike: M900
Posts: 1,422
I had success on a ZX9R by a) drilling a 1.0mm hole into the casting below the level of the top of the jet until I could just discern the brass of the jet then over a period of about a week regularly dousing the hole with a mixture of 50% acetone/50% diesel (apparently Automatic Transmission Fluid also works but I have never tried it).
I have also, when the head of the jet has lost its slot, junior hacksawed the casting away such that the head of the jet is exposed then hacksawed a new screwdriver slot in the top. The penetrating mixture is again also a part of the process
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