Quick question regarding an 01 GTS with the Mikuni BN-40i-38 with the accelerator pump. From what I can see the fuel must go from the fuel pump through the body of the carb to the needle valve and from there through a hole in the metering chamber to the little hose that feeds the accel pump. If the needle valve will only open under the prescribed PSI its set at which only occurs at higher RPM's, how does the accel pump have fuel for starting before the engine is even running and the needle valve is closed?
Either I don't understand the fuel route to the accel pump, or that once the system is primed, the accel pump will "pull" fuel through the needle valve when you pump the accelerator? Thanks for any clarity on this. I ask because my accel pump stopped squirting and after careful inspection and rebuild it still is not squirting even though the fuel pump is working fine.
Either I don't understand the fuel route to the accel pump, or that once the system is primed, the accel pump will "pull" fuel through the needle valve when you pump the accelerator? Thanks for any clarity on this. I ask because my accel pump stopped squirting and after careful inspection and rebuild it still is not squirting even though the fuel pump is working fine.