Cylinder Head – YX 125 – 52.4mm (Big Valve)

YX 125cc cylinder head.

Material - Aluminium alloy
Piston diameter suitability - 52.4mm
Valves - Inlet 27mm / Exhaust 23mm
Cylinder head length - 91mm (machined face to machined face)
Intake port diameter - 26mm
Exhaust port diameter - 22.5mm

Made to fit - YX, Lifan, may fit other engines (check dimensions), engine code would typically be 153FMI, should also have a 52.4mm piston and not a 54mm piston, should also have an alloy barrel and not a painted black steel barrel, should also have valve inspection caps with screws and not the large 17mm nut screw off type.

Not compatible with the YX125 153FMI electric start engine as the engine stud hole centres are different.

Supplied with internals such as camshaft, valves and tappets already installed.

Note: This part will require the valve clearances/tappets to be set to IN 0.10mm & EX 0.15mm upon installation.