Answer by taking a quote from the following article:

SNFU is a Canadian hardcore punk band. They formed in 1981 in Edmonton, and relocated to Vancouver in 1992. They have released ten full-length albums and have been a formative influence on the skate punk subgenre. Their work has on occasion been included in rankings of the best Canadian music.

Jones left the band due to exhaustion in mid 1985. Dave Bacon briefly replaced him on drums, but moved to bass after the subsequent departure of Schmitz. Jon Card (previously of Personality Crisis, and later of D.O.A and the Subhumans) became the band's drummer, and the group toured North America. SNFU's second and more experimental album, If You Swear, You'll Catch No Fish, was recorded in 1986 and released on BYO. Card left the band after the album's completion. With his replacement, Ted Simm, SNFU self-released the She's Not on the Menu 7" EP, which also included the "Life of a Bag Lady" recordings from 1982. Bacon departed in early 1987 due to musical differences and health concerns. He was replaced by Curtis Creager (of Urban Holiday), a former roommate of Chinn and Marc Belke.  The band enjoyed steadily increasing popularity: in 1987, Flipside fanzine voted them Best Live Band, beating the Red Hot Chili Peppers and Fugazi. Metallica included photos of lead singer James Hetfield wearing SNFU's iconic 'zombie' T-shirt in their $5.98 E.P.: Garage Days Re-Revisited. SNFU toured alongside Voivod and the Dayglo Abortions, and signed to the larger Cargo Records imprint. Their third record, Better Than a Stick in the Eye, was produced by Cecil English and issued in 1988. The album remains influential among hardcore punk audiences. The group's touring in support of the album included their first trip to Europe.  Due to internal tensions and musical differences, they disbanded in late 1989. Simm returned to his home of Winnipeg, while Chinn relocated to Vancouver and led the short-lived bands The Wongs and Little Joe. The Belkes and Creager formed the Wheat Chiefs, a melodic rock band which released one record, Redeemer, in 1996.

What other band memebers were replaced?
Bacon departed in early 1987