Prevent idle mixture screw leaks with this Twin Powerâ„¢ repacking kit. The Twin Powerâ„¢ Fuel Mixture Repacking Kit allows you to maintain your carburetor for peak performance. This kit includes spring, O-ring and washer and fits all Keihin FCR MX carbs

Our recalibration kit cures throttle flat spots, backfiring and poor throttle response common to the CV carbs. It increases power midrange and top end while maintaining satisfactory fuel economy.