20mm carburetor for 139qmb gy6 scooter carb cvk 50cc-100cc atv quad dirt bike go kart pan300 </p><b>fitment:50cc-100cc scooters</b><br></p><b>features:</b><br>cvk style carburetor<br>20mm intake-side outlet<br>38mm filter-side inlet<br>#80 main jet<br>#37 idle jet<br>accelerator pump<br> automatic electric choke (2-wire)<br>unsealed and rebuildable<br>