3 possibles come to mind fuel vaporization in the line to the carby or in the carby bowl (check float level adjustment) valves are being held open when hot--- valve stem lengths increase reducing tappet clearance___adjust valves when hot check coil/ ignition module for failure when hot as they can open circuit ./ short circuit when internal components fail from heat
Answers & Comments
3 possibles come to mind
fuel vaporization in the line to the carby or in the carby bowl (check float level adjustment)
valves are being held open when hot--- valve stem lengths increase reducing tappet clearance___adjust valves when hot
check coil/ ignition module for failure when hot as they can open circuit ./ short circuit when internal components fail from heat