There is no 175 barrel in the world for this bike as i wont change a thing except fuel and oil. It is a sachs 125 5 soeed which DKW used the same motor, frame and exhaust are different. There is a DKW in issue 18 of VMX and although it has 5 gears and 4 neutrals it should be a fun bike. I had a brief ride and it goes pretty well for a 69 125. Love the earls fork it is smooth and lifts up when you brake instead of diving, very strange.