MotÃ rhead are a British rock band . The band were started in 1975 by bassist , singer and songwriter Ian Fraser Kilmister . MotÃ rhead ( Ë moÊ tÉ rhÉ d ) are a British Rock band formed in 1975 by bassist , singer and songwriter Ian Fraser Kilmister , known mostly by his stage name Lemmy , who has remained the sole constant member .