Originally Posted by au_Nightmare
Maybe same style but they are different.
DX12: Carburetor : 3 Needles Slide 5.4 mm
D3R: Carburetor : 3 Needles Slide 5.5 mm
D5R: Carburetor : 3 Needles Slide 6.5 mm
From what I read earlier in this thread the larger D5R carb makes it harder to tune. My D3R tunes pretty easy. If I have issues when I use get around to using the D5R I'll just use the D3R carb I guess

Or you can just buy the 5.4mm aluminum venturi from me.

Then you can pop it on and off without having to remove and replace carbs which can lead to air leaks.