Unleaded Kit-Cylinder Head

To convert your cylinder head:

• Strip the cylinder head of all components. Have the head U.V checked for any cracks and then clean in caustic soda.
• After washing off the caustic solution in a hot wash tank, dry the head and grit blast to remove any remaining carbon and to clean the waterways.
• Fit the Manganese silicon bronze valve guides and ream to size. (Bronze removes heat two and a half times faster than original cast iron valve guides).
• Machine the exhaust seats and fit the lead free compatible seat inserts.
• Cut the valve seats using three angles, (15, 30 & 45 degree). This aids the flow and increases B.H.P. for use with premium lead-free fuel.
• Blend the throat valves to remove any sharp edges caused by fitting the inserts and cutting the seats.
• The head may need skimming to ensure the face is flat.
• After de-burring, hot wash the head, dry, assemble and paint.

This procedure is best left to a qualified engineer/machinist and these instructions are offered as a guideline only!