What fuel should I use in a CB350 / CL350 / SL350? November 06, 2018 05:09 Updated We recommend premium (92+ octane) fuel; if it can be found non-ethanol fuel as well. Related articles What is the fuel capacity of a CB350 / CL350 / SL350? Honda CB350 | CL350 | SL350 Factory Service Manuals How to Synchronize Carburetors Honda CB350 / CL350 / SL350K0 How to rebuild the factory Keihin CV carburetors on your Honda CB350 / CL350 / SL350 K0 Parts That Will Need Replacement On A Vintage Honda Project Motorcycle aka The "Laundry List"