Need help identifying a flat Tracker frame

Received an email from Kyle Taylor who needs some help identifying a flat tracker frame. Maybe someone here can help him so I am posting his request below.

To the WPFTA:
A friend of mine recently acquired a flat tracker with what appears to be a Stalcup frame or a Stalcup was the owner. The name "Stalcup" appears on the frame at the rear by the tire. It looks like "welding writing". It has a Yamaha two stroke engine. No brakes but the rear disk is present. The tank(small capacity) and seat pan/fender are black fiberglass and look like after-market dirt tracker stuff.

I can send pics if anyone can help me with the id of this bike.

Kyle Taylor
870-807-3838