Mutt Motorcycles New HQ It’s been a while in the making but the new Mutt Motorcycles and Monday Mo.Co. store , showroom and Brake Fluid Coffee Bar is finally open. The full range of Mutt’s are in store along with the new Mutt apparel range and a wide variety of motorcycle related goodness from a carefully selected range of brands. Mutt House, 77 Upper Trinity, Digbeth, Birmingham, UK. B9 4EG.