On my Boxer I will be running this pump with the solenoid - The reason for chasing this pump solution was to eliminate the need to "restrict" the short 4 stroke exhaust to get a decent muffler pressure. An all in one solution would be great in this case and it would not require the bias adjustment of pressure. Just the rpm input to Pump output to mimic the muffler pressure. Mixture would be done by the system as it is now with the solenoid.