Make sure you route the new cable the exact same way as the old cable and make sure the adjuster at the grip and the adjuster at the carb are turned all the way in for maximum slack. Turning the adjusters out will tighten it. Also make sure you have the cable hooked up the correct way at the grip and at the carb. If that's all correct and there's still no free play compare the length of the new cable to the old one side by side. They should be the same length