I looked into this more than a year ago when there was a guy from Joisey selling Smarts in a box basically. Engine choices were the 3 cyl standard engine or this GSXR motor on a rear clip from the UK. The glider, as they were called, all by itself was around $17-$18K with no engine and the *ZUKI* kit was another $10K approx (probably more as the shipping I dont think was in that. It is a KA setup...no question about it. Depends on how much $$$$ you want to spend on a novelty like that and how many of the local police you want to get to know.