Crowes and Craig Ross of Lenny Kravitz's band. While living and working in Los Angeles he got together again with Michael Monroe again and Yaffa even played a gig with Michael Monroe's solo band in Los Angeles in 1988. In 1989 Yaffa briefly joined a Finnish band Smack who had moved to Los Angeles. He played bass on tracks "Can You Dig It" and "Crazy River". He was credited as Ulan Bator because he was still in Jetboy at the time and had been asked not to use his real name. Jerusalem Slim Yaffa moved to New York City in 1990 to join Hanoi Rocks frontman Michael Monroe in a new band, Jerusalem Slim. The group also featured Billy Idol's guitarist, Steve Stevens. The band broke up in 1992, because of Michael Monroe's and Steve Stevens' strong musical disagreements. Jerusalem Slim released an album and did a tour as Jerusalem Slim although Steve Stevens was no longer in the band and the band refused to play any songs out of the actual Jerusalem Slim album. From 1990 to 1993 Yaffa played in a band called Love Pirates with Gass Wylde of the Pretenders. Between 1991–1994 Yaffa also played in Alison Gordy's band. Gordy had earlier played with Johnny Thunders. Yaffa played on Gordy's album Blonde and Blue. Demolition 23, Mad Juana, Joan Jett and Murphy's Law Demolition 23 saw Yaffa in another band with Michael Monroe. This group also featured Jay Henning (Star Star) and drummer Jimmy Clark. Henning was later replaced with Nasty Suicide. Demolition 23 recorded one album produced by Little Steven. The group broke up with only one album after Nasty left in the middle of a European tour. Earlier in 1993 Yaffa and Monroe recorded Steppenwolf's song "Magic Carpet Ride" with Guns N' Roses guitarist Slash for the movie Coneheads. In 1995, Yaffa formed Mad Juana (briefly known as Lewt Vagrant) with his wife Karmen Guy. Yaffa described the band's sound as "Think of the Pogues meets (the) Clash with all acoustic instruments. Beautiful female voice in a Velvet Underground dungeon.". The following year he played bass on an album by Jan Stenfors, aka Hanoi Rocks' Nasty Suicide. From 2000-02, Yaffa played in the New York based band Vasquez with former DGeneration guitarist Richard Bacchus. Along with drummer Eric Kuby, this trio released one CD, titled "Two Songs", and also recorded a live record which remains