Here's a list of (some of) the bands the members of Motorpsycho used to be in before Motorpsycho was formed:

KJELL RUNAR "KILLER" JENSSEN
(Motorpsycho's drummer October 1989 - September 1991):
Gult Regn (1984-85)
Seven Chinese Brothers (fall 87-99):

Kjell Runar: drums
Frode Singsaas: Bass/guitar
Lars Tore Langorgen: Guitar
Knut-Ståle Dischington: vocals/guitar

Cryptkicker Five (1988-89) - They were big fans of MC 5 and other bands from Detroit:

Kjell Runar: drums
Stein Jenssen: bass
Ketil Fiskvik: guitar
Pål Martinussen: guitar
Halvor Egner*): vocals
*) Grandchild of Torbjørn Egner.

Aural Blow Job (1989) - with Bent
Swamiis (1990-)
Hurricane Fighter Plane

HANS MAGNUS "SNAH" RYAN:
The Spitfires (1982)
Egge Gospel (1983)
Export (1984)
Pestilence (1985-86) - made "Warning" MC (700 copies)
Psyc. Art (1986)
Ryan's Booze Band (1987) - with Bent on drums!
Beyond Structure (1987)
Soundtracks (1988) - became:
Secret Fish

BENT SÆTHER:
Breakfast (1980)
Piggtrå (1983) - became:
Black Widow
Worrier (1983)
A Wild Thing (1984)
In Nomine Dei
Ryan's Booze Band (1987) - with Snah
Lazy
Sweet Emotion
Flippa Hormoner (1987-88)
Aural Blow Job (1989) - with Killer

HÅKON GEBHARDT:
Blodig Piggtråd (1980) - became:
Nongal (1981)
Mental (1982-84)
Defender (1985-87)
Misty Morning (1986)
Torn (1987)
JAH (1988-89)
Hegreduo (1989-91) - made music for the theatre a.o.

MORTEN "LOLLY" FAGERVIK:
Albino Slug
Morphars Hus

Gebhardt also appears on the b-side of the following 7":
Ragnar Indrebø: Julekveld i Oslo/Kjære Oslo.
Private issue. Recorded in December 1990.