Suzuki DR350 suction tube

grabcad

Had the problem of intake resonances (wrong lenght to first sectional jump) on re-build engine with TM33 pumper carb, causing uncontrollable rich mixture on full throttle around 7000 1/min.This design shows a stronger jump in cross-section without restricting the intake flow.Works well and believe me: this was months of work going through different iterations ;-)Have printed it in TPU 95 Shore and it works well, although overhang surface is not perfect. Gravity casting investigations in 2k PU still ongoing.