I've never seen it done with electrical tape.....I think you're thinking of friction tape, which is usually a black cloth type of tape that looks like electrical tape. Put a spiral wrap of it around the bar, hit it with some contact cleaner (only a little, but I guess gas would work too) which softens the glue in the tape, and slip the grip on. Safety wire it and you're done. It's probably the most common method of the factory mx/sx mechanics.