What is this sprocket off of?

[Nick_R_23]

My friend has this sprocket, it is a 2 piece/split kind. 'Sidewinder 42 teeth' is what it says on it, #3051. The bolt pattern is 5/~60mm. We were wondering if anyone knew what it is off of?

http://i84.photobucket.com/albums/k28/Nick_R_23/sprocketsplit.jpg

-Nick :TrikesOwn

[greenhuman]

83 - 85 200x