Driveline and they don't hurt your wallet to bad.
http://drivelineperformance.com/billet-intake-manifold-kit-fits-33-34-35mm-carburetors-yamaha-banshee-350/
Or from Top Dog
https://www.topdogracing.com/shop/banshee%2Fintake-carb-and-fuel-system-parts/169
Good info. I ran 28s on oem cylinders and cam dialed them in for me and they worked fantastic. If I ever step up to a driveline I'll Remeber they like 35s now.