Fuel System

The Honda CT90 fuel system utilizes a unique Keihin slide carburetor and petcock in one. The fuel tank feeds the petcock through the fuel line running through the internal framing. With the carburetor and petcock being a single unit, it is recommended to rebuild the petcock, carburetor, and clean out the gas tank simultaneously as all 3 are slightly disassembled to get to any one of them. The CT90 carburetor also features a unique altitude knob that supplies more air to the mixture when above 6,000 feet above sea level.