Motorized bicycle grips

Has anyone tried to change grips? Will a standard size grip fit over the plastic insert for the throttle? I've used foam ones will good results but have been looking at a set of Nirve grips. Think it will work? The brown ones SKU1892Nirve.com - Cruiser Parts

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I've not had good luck with bicycle grip's working on the throttle...good grip's just don't seem to stretch enough. But maybe someone has had better luck then me or better tip's to get them to work.

Need motorcycle, or mini bike grips 7/8".....

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48cc Grubee Starfire Round Head......