Vicious Cycles CB160 racing gems.

Vicious Cycle http://viciouscycle.com/ are a big driving force behind the wonderful new racing class in the U.S. for CB160's. This looks set to grow really fast, so buy one while you can.

from their website:

"Vicious Cycle is at the epicenter of the CB-160 racing phenomenon in the Pacific Northwest. We are the primary parts source for your performance CB160 or CB175 racer. We've been building race bikes since the beginning of this craze and have sourced specialty parts and manufactured our own along the way. Vicious Cycle knows the CB-160 (along with the vertical and sloper CB-175's) inside and out. "