Re: none ideling 60 help!
Check that your carburetor throttle plates are closed at idle and perfectly synchronized through their range of motion. The throttle plates should be horizontal and no more at WOT. Often the carburetors are replaced after service without following the synchronization and linkage procedure in the service manual.
If you find that they are not fully closed at idle, disconnect the throttle cable and adjust the carburetors to synchronize, then adjust until the roller is aligned with the correct raised mark on the cam follower. When that is satisfactory, adjust the cable so that it slips on without moving the throttle lever on the engine.