RE: problems with my DA50????
It might be the needles,, just play with them,, make sure you lean the low end out far enough so when you throw the throttle to it from a idle it will hesitate, then richen slightly until it can set for 20 seconds and take the throttle,,, and I am like Josey Wales when I made the original box I glued it together with no holes or cracks and sealed the hose going into it with silicone, everything works great,,