I have a new PAW .40 I can't get to idle very well. The high speed needle and compression are set dead on, but the low side is too lean. While at idle the engine misses and then will die. If I take my finger and choke the carburetor for a second ot two, while at idle, the RPMs increase and the engine runs smoothly until the extra fuel is burned off. Any ideas on how to change the low speed fuel mixture?

Thanks,
Carter