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the best carburetor to save gasoline on the twister 250-how to make the twister economical4/10#max guys here's the explanation why this carburetor makes the twister economical, simple thing, it's cheaper than the original parallel model, it's worth it, remembering not to cut the spring too much because if it gets too weak when the cable gets old it won't have the strength to pull because the cable is rusty, watch the other video showing the latest modification for the motorcycle goes from 30 per liter 30-35,