My '78 Puch has a Bing carb. When you start the engine, it idles fast with no choke on (our outdoor temp. is at the 100 degree mark these days). After a short engine warm up, the idle speed drops to a low, uneven, sometime stalling engine speed. When I restart the engine, I have to increase the idle speed using the screw provided. I think the poor idling is being caused by a rich mixture, however, I can not find a idle circut, nor anyway to adjust the idle mixture!!! I have tinker with the float setting, hoping this will have some effect, but nothing doing..... Any recommendations on how to lean out the idle mixture? Thanks, Cris
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