I just drill a hole in the fuel injector body, downstream from the butterfly, tap it, and screw in the Scottoiler adapter. Its now working fine on my '04 F650 GS twin spark model.
I've used this method on Mikuni carbs on other bikes as well. I have never liked the spigot in the rubber sleeve method.
Some might say "what if you stop using the Scottoiler, you have a hole in the injector/carb body?" Easy, just screw in a blanking plug.
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