I have a 98 WR400 and I just installed an Edelbrock carburator that I purchased from Barnums Pro. The installation was simple and the carb is very nice in fit and finish. After installation I turned on the gas, kicked twice and she fired right up. I reached down and adjusted the idle speed with the nifty remote idle screw knob and took off. Short version - the bike rips. Great acceleration, front wheel comes up fast, lot's of power. I recommed it to anyone wanting to go a different road than the (I'm going to get this FCR properly jetted if it kills me) crowd.