nourish yes do as i did drill all the ally factory plugs out except the one that sprays the timing gears unless you can set it up in a mill ---- still dodgy and no need, then clean them out with solvent i used petrol and thin brushes those that are on twisted wire , then use a syringe and pressure more solvent through them and blow them out with compressed air. i spent ages doing mine on the berger build and the crud that came out was LOADS, then tap the holes and make new alloy plugs put a slot in them and screw them in with goooo. jobs a good en/ i did the camshaft feed in the right crankcase half -- maybe not applies to your engine, the bottom one in the right hand case and the one above the relief valve.
