the design was to allow the handlebars to be removed, so the bike could be easily transported in the trunk of a car. it's not to adjust height. this was MTD's first version of the leading suspension Trail Flite. i'm not a fan of this handle bar system frankly, but that's what you got. you can convert to the motocross style bars in theory i guess. but probably not a great idea. the issue with these bars is related to handling. the motocross bar set up allows the bike to handle better off-road. these bars are more for street riding positioning i guess, and feel "odd", at least to me.