Looking for a kill switch

Hello! This is the outcasts from West Branch Middle School, and we are looking for a kill switch for the Bonanza minibike. We were also wondering if the Bonanza minibike had a kill switch and if so where would we find one.
OldMiniBikes has a big selection! Click the link at the top of the page, or go here
My personal experiences with these...
Be advised that even though they show a toggle shut off switch for 1" handlebars, I have found that of the 4 or so I have ordered over the years only ONE would actually fit the 1" bars. All of the others marked/sold for 1" bars were actually identical to the ones for 7/8" bars and would not fit- just a head's up.