From Wikipedia ~
Through the years, Geoff Downes and John Payne were the two most consistent members of the band, which experienced a revolving roster of noted musicians, particularly in the 1990s. The lineup has been as follows:
Current members of Asia are the following founding members:
Geoff Downes - keyboards and backing vocals. (former member of Yes and The Buggles).
John Wetton - lead vocals, bassist, and guitarist. (former member of King Crimson, UK, Uriah Heep , Roxy Music and Family).
Steve Howe - guitar, mandolin, backing vocals (also a member of Yes and formerly a member of GTR).
Carl Palmer - drummer and percussionist (also a member of Emerson, Lake & Palmer).
Current members of "Asia Featuring John Payne" are:
John Payne - lead vocals, bass, guitar (also in GPS)
Mitch Perry - guitar
Jay Schellen - drums and percussion (also in GPS)
Erik Norlander - keyboards
Non-active band members of Asia are:
Vinny Burns - guitar, backing vocals
Ian Crichton - guitar (member of Saga)
Alan Darby - guitar
Guthrie Govan - guitar , backing vocals (now in GPS and formerly of "Asia Featuring John Payne")
Holger Larish - guitar
Aziz Ibrahim - guitar, backing vocals
Greg Lake - lead vocals, bass (former member of King Crimson and Emerson, Lake & Palmer). Heard on Asia in Asia and "Heat of the Moment" (live) is on Lake's From the Underground... the Official Bootleg album (1998).
Mandy Meyer - guitar, backing vocals
Keith More - guitar, backing vocals (former member of Arena)
Zoe Nicholas - backing vocals
John Payne - lead vocals, bass, guitar (now in GPS and "Asia Featuring John Payne")
Al Pitrelli - guitar (former member of Danger Danger, Hotshot, Savatage and Megadeth and current member of Trans-Siberian Orchestra)
Elliott Randall - guitar
Bob Richards - drums (more recently member of Man (band) )
Jay Schellen - drums, percussion (former member of Hurricane, World Trade and Conspiracy, now in GPS and "Asia Featuring John Payne")
Chris Slade - drums, percussion (former member of AC/DC, Uriah Heep, and The Firm)
Mike Sturgis - drums, percussion (former member of 21 Guns, later a member of Wishbone Ash, The Untouchables and Psycho Motel)
Pat Thrall - guitar, backing vocals
Trevor Thornton - drums
Susie Webb - backing vocals
John Young - keyboards, backing vocals
Certain musicians have joined and left after a short time without recording any studio material with the group. The most notable collaboration of this kind was the participation of Greg Lake in the "Asia in Asia" concert on bass guitar and lead vocals. Yet more musicians have played as session musicians or have guested with the band without formally joining. Some of these artists include: Robert Fleischman, Vinnie Colaiuta, Francis Dunnery, Ant Glynne, Scott Gorham, Tomoyasu Hotei, Luis Jardim, Ron Komie, Tony Levin, Steve Lukather, Kim Nielsen-Parsons, Simon Phillips, and Alex Thomas