KX250   Kit includes
1 head body, 2 domes, 1 o-ring kit
7 acorn nuts (1995-2004), 7 copper washers
Head brackets

Order your kit from parts listed below

1995-2002 Head body
2003-2004 Head body
2005-2007 Head body

OS3 o-ring kit 1995-2004
OS17 o-ring kit 2005-2007 same as OEM o-rings

KB2 Head Brackets 1995-2002
KB4 Head Brackets 2003-2004
KB5 Head Brackets 2005-2007

Dome selection 1995-2004
K21   21.6cc
K22   20.2cc
K23   19.4cc
K24   18.3cc

Dome selection 2005-2007
W21   21.6cc
W22   20.2cc
W23   19.4cc
W24   18.3cc

Note
Heads colors are red, blue, black, gold and aluminum
K21 or W21 domes are closest to stock compression
K2 and W2 series domes use o-ring seal, the max bore is 68.5mm
Dome modification for big bore available see FAQ