Cam Chain Sprocket Guide - CRF110 tbw0341 or they were just using

or they were just using the basic 143cc bore kit with stock head that has decent compression (due to a smaller combustion chamber)

Clearances should always be checked during installation

– Head gasket kit – includes the cylinder head o-ring set and an exhaust gasket

- 64mm head gasket kit - includes the cylinder head o-ring set and an exhaust gasket

210lb rider = 160-200psi

Cam Chain Sprocket Guide - CRF110 tbw0341 or they were just usingCam Chain Sprocket Guide This 23T cam chain guide with part number 14670 KWB 600 14670 KWW C00 is a genuine Honda part, which means it is exactly the same quality as the one mounted at the factory when the vehicle was new. Part number 14670 KWW C00 has been superseded by part number 14670 KWB 600. FITMENT HONDA: CRF50F (ALL YEARS) CRF70F (ALL YEARS) CRF110F (ALL YEARS) CT70 TRAIL (ALL YEARS) XR50R (ALL YEARS) XR70R (ALL YEARS) Z50A MONKEY (ALL YEARS)