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OK progress but not good news removed heads rear head ,valves and piston all perfect but front ,,no damage to bore or piston ,,, inlet valve is fine ,, opener rockers and cam all ok as are head bearings ,
the exhaust valve is the problem head exhaust valve partially seized??? i have it out now the fork on the closing rocker may be bent have to compare to inlet closer fork ,, the valve stem is smooth and unmarked inside , the valve neck is straight when placed on a flat glass and the valve poppet has no damage ??
so what to do hmmm???
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MONSTERMAN
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