Cylinder Head for Honda CRF70 XR70 CT70 C70 ATC70 TRX70 S65 ( 50cc Large Bore /70cc Small Bore )Fit For:for Honda S65for Honda TRX70for Honda ATC701978-1985for Honda C701980-1983for Honda C701971-1972for Honda CRF70F2004-2009for Honda CRF70F2011-2012for Honda CT701969-1994for Honda XR70R1997-2003Product Description:A Complete New Standard Sized Replacement Cylinder Kit100% New, and never been used.New Cylinder and piston Kit fitfor Honda ATC70 CT70 TRX70 CRF70 XR70 70CC 72CM3Replaces Existing Cylinder Assembly, just replace and ride again.Size:Outer Bore Size: 47mmInner Bore Size: 39mmIntake Valve Outside Diameter: 23mm / Length 66mmExhaust Valve Outside Diameter: 20mm / Length 66mmNote:This head can be used on either a 50cc or 70cc engine. But Please note that it is for Domed 50cc or Flat Top 70cc.If you have a 50cc engine:There are 2 different 50cc Cylinder heads for Honda. Compare the Combustion Chamber Size shown below, to your current head. This head will only work with DOMED pist Discounted at only: US$ 29 
