I have been talking to Kevin @ Lectron fuel systems. They have new single downdraft carbs up to 50mm I think. They use a cable system to join dual carbs. We would use a banshee throttle setup. The carbs has power jets, he said they are a breeze to tune. I told him what I had and he said I needed 40mm carbs. They will come setup very close out of the box. The downside is they are nearly a grand. I may get a set later on down the road, just passing on what I have found out.. Somebody needs to try them:lol: