BYING FZR 600 AND FITTING THEM ON YOUR 400 IT\\\´S A BIG WRONG. REQUIREMENTS OF YOUR 400 ARE COMPLETELY OUT OF THESE OF 600. YOU\\\´LL SIMPLY HAVE A FUEL CONSUMPTION AND NOTHING MORE. YOU \\\´LL ALSO HAVE TO KNOW THAT YOUR CARBS ARE 30MM AND 600\\\´S ARE 32MM. ALTHOUGH YOU \\\´LL HAVE NO FITTING PROBLEMS, YOU\\\´LL HAVE PROBLEMS ON THE LOW RPM TORQUE. THE BEST SOLUTION WIIL BE A CARBURATOR KIT (GENUINE OR AFTER MARKET) 
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