RM125   Kit includes
1 head body, 2 domes, 1 o-ring kit
5 copper washers

Order your kit from parts listed below

1993-2009 Head body

OS2 o-ring kit same as OEM o-rings

OEM 1995-2003 radius top piston
Dome selection (see note)
Y11 10.0cc
Y12 9.3cc
Y13 8.8cc
Y14 8.1cc

OEM 2004-2009 flat top piston
Dome selection (see note)
F11 7.8cc
F12 6.9cc
F13 6.0cc
F14 5.2cc

Note
Heads colors are red, blue, black, gold and aluminum
RM125 1993-2003 stock with radius top piston
RM125 2004-2009 stock with flat top piston
Flat top or Radius top pistons will work in all RM125 provided matching dome is used
Y11 domes are closest to stock compression 1993-2003
F11 domes are closest to stock compression 2004-2009
Y1 and F1 series domes use o-ring seal, the max bore is 58mm
Dome modification for big bore available see FAQ