Mass bounds for doubly-charged bilepton gauge bosons are derived from const
raints on fermion pair production at LEP and lepton-flavour violating charg
ed lepton decays. The limit obtained of 740 GeV for the doubly-charged bile
pton does not depend on the assumption that the bilepton coupling is flavou
r-diagonal, unlike other bounds which have been given in the literature. (C
) 1999 Published by Elsevier Science B.V. All rights reserved.