Improving low valve lift flow

fishmens67 said

The op asked a generic question I gave a generic answer.
When talking reversion there are many things to consider valve timing , exhaust, intake type, on and on.
Is reversion a problem with a stock engine? stock cylinder head?

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The generic question was asked from the perspective of low lift flow from what a flow bench tells you you would have not from what actually happens in a running engine. Agreed there are many variables that contribute to reversion but viewing flow from the perspective of a flow bench as a opposed to what actually happens in a running engine is flawed.

Concerning a stock engine and reversion why do they sell throttle body cleaner? Ever pull the air cleaner lid of your engine and wonder how that black stuff got deposited on the underside? That's how far reversion goes all the way past the carb. People think flow is only one way its not and the bigger you make everything in regards to valve, port, intake and carb the worse it is at low running speeds.