This is a over-sized radiator made for the nt650 hawk.

I destroyed the stock one the first time I crashed it. Wanting to replace it with something that would be an upgrade, and survive future crashes, this was the best way to go.

I got it from a company called JW Raceparts back in '97.

J.W. Raceparts
92 Bogart Ave
Garfield, NJ
Phone (201) 773-2484
or
JW RacePart-Nyack, NY (845) 358-0300

Not sure if they are still around, but if so, I highly recommend this product for the Hawk. It's narrow so it doesn't touch the ground in a crash, and it does an amazing job of cooling the bike. Even on the hottest day in August the bike won't over-heat. I do however, have to tape over about 1/2 of it when I'm running in the spring, but hell, that's an easy fix. :)