Yamaha - Carburetor Repair Kit Fuel System Service Kit 6J8-W0093-00-00. Overview. If you've worked on Yamaha 2-strokes like the 90 or 75 horsepower range, you know carburetors take a beating over time. Between fuel sitting, heat cycles, and regular use, they eventually need a proper rebuild to run right again. The Yamaha Carburetor Repair Kit 6J8-W0093-00-00 is what gets those carbs cleaned up and back to smooth operation. It's one of those maintenance jobs where you really feel the difference t