Originally Posted by
Ambros303
Yeah must be
I found this pic of a GRP Ninja idle screw. If you look closely it is different from the idle screw that is in my GRP tuned or the Tecnopower engines. It looks more like your broken screw. Since the GRP tuned is based on the GRP Ninja you must have an early model GRP tuned and they made a running change like you suggested.

That screw is exactly like mine. Too bad they don't make them anymore. I do have a guy sending me a complete grp carb next week so at least I have one coming.