Technipion contribution tob→sγ

We show that the present limit on the inclusive decay $b\rightarrow s\gamma$ provides strong constraints on Technicolor models. In particular, small values of $F_\pi$ and the mass of charged octet and singlet technipions are excluded, assuming the most natural form of the technipion coupling to the ordinary quarks.Comment: 7 pages, uses harvmac.tex, 5 figures (as uuencoded PostScript file) include