These clipon towers bolt right on in the stock location with no interference on the tank, fairings or gauges.  These clipon towers are lower than the OEM parts (about 1.5 inches on the Ninja 250 and 3 inches on the older EX500) and also have a comfortable 5 degree down angle instead of the completely flat OEM setup.

Racers and street riders alike have used these bars for years to give these bikes a much sportier feel.  You will also get the added benefit of width adjustment and access to inexpensive replacement handlebars.