DSC6401 with 84cc mod with 150# compression would not start and would foul plug immediately. Thinking the needle was the culprit turns out the welsh plug by the needle had fallen out. The owner wants to know if there is a carb better suited for the jug mod to supply more fuel for the 84cc. I would like just a bolt-on carb and not have to mod the new carb to make it fit. A guy on eBay has a Zama C3M-DM11 but shows three different carbs in his pics. The carb on mine is Zama C3M-DM12. Thanks for any help.