I recently traded for a Kuwahara frame. I believe it to be a Cyclone. It has been repainted but what i can see of the original paint shows that it was a black fork with a yellow to black fade frame. Fork is stamped TANGE. The frame I'm not too certain on. It was hard for me to find info on this model but I was able to gather some. The previous owner said it was DB Tange Infinity tubing. I can't see seams anywhere on the main triangle but I do see them on the chain stays. Could it be that the frame is more than one material and if so what would it be? Fork ends and drop outs are both Tange and the seat post diameter is 26.8.

Thanks