Complex sentence: He then moved on to bands called the Abandoned and God Riots 73 and then found himself playing in the Adolescents again in 1986 as Tony Montana when the band reformed.
Split into simpler sentences: He then moved on to bands such as the Abandoned and God Riots 73. He found himself playing in the Adolescents again in 1986, assuming the stage name "Tony Montana" when the band reformed.