ORIGINAL: WLJ
I've got a new DA50R going in a H9 Extra 260. How do I drive a B&B Smoke pump? I'm guessing, drill another hole in the spacer between the Carb and engine, and install another nipple, like the one that drives the carb diaphram.
On the crankcase of the DA, right infront of where the black spacer/reed block is, you should see a small 4-40 or 6-32 plug screwed in the crankcase. You should be able to remove it and install a nipple fitting there to get your crankcase pressure for your smoke pump. DA used to get the pulse for the carb there before they switched to the carb block.