CR125   Kit includes
1 head body, 2 domes, 1 o-ring kit
5 acorn nuts, 5 copper washers

Order your kit from parts listed below

1992-1999 Head body
2000-2004 Head body
2005-2007 Head body

OS1 o-ring kit fits all years

Dome selection flat top piston (see note)
H11  8.2cc
H12  7.6cc
H13  6.7cc
H14  5.8cc

Dome selection radius top piston (see note)
K11  9.2cc
K12  8.5cc
K13  8.2cc
K14  7.6cc

Note
Heads colors are red, blue, black, gold and aluminum
CR125 1992-2003 stock with flat top piston
CR125 2004-2007 stock with radius top piston
Flat top or Radius top pistons will work in all CR125 provided matching dome is used
H11 or K11 domes are closest to stock compression these domes use o-ring seal, the max bore is 56mm
Dome modification for big bore available see FAQ