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It's really a pretty simple process to check the valve lash. You'll need two feeler gauges, a .004" for the intake valves and a .005" for the exhaust valves. With the covers off turn the engine over (with the starter while the kill switch is off so it won't fire) untilboth of the rockers on one of the cylinders has a little bit of play or looseness. Slip the .004 feeler gauge blade into the gap between the end of the rocker and the intake valve stem. The intake valve stem is the one directly below the intake runner from the carburetor for that cylinder. Loosen the locknut, turn the screw until there's just a slight drag on the feeler as you move it and snug up the lock nut. Repeat the process with the .005 for the exhaust valve and then turn the engine over to free up the rockers on the next cylinder. I'd recommend replacing the rocker cover seals. You can use some sealant on them but once the get old and hard changing them is the best. I use super glue to stick the seals to the rocker cover to make it easier to put them on the engine without falling off in the process.
It's really a pretty simple process to check the valve lash. You'll need two feeler gauges, a .004" for the intake valves and a .005" for the exhaust valves. With the covers off turn the engine over (with the starter while the kill switch is off so it won't fire) untilboth of the rockers on one of the cylinders has a little bit of play or looseness. Slip the .004 feeler gauge blade into the gap between the end of the rocker and the intake valve stem. The intake valve stem is the one directly below the intake runner from the carburetor for that cylinder. Loosen the locknut, turn the screw until there's just a slight drag on the feeler as you move it and snug up the lock nut. Repeat the process with the .005 for the exhaust valve and then turn the engine over to free up the rockers on the next cylinder. I'd recommend replacing the rocker cover seals. You can use some sealant on them but once the get old and hard changing them is the best. I use super glue to stick the seals to the rocker cover to make it easier to put them on the engine without falling off in the process.
