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Eliminates flat spots in Keihin constant velocity (CV) carburetors. Permits easy tuning of the carbs on stock motors as well as motors with performance cams and exhausts. Each kit includes instructions, a selection of main jets, a needle jet, an adjustable needle with spacers and circlips, a spring, and drill bits.
Note
Fits Harley-Davidson Big Twin 89-95, Sportster XL 89-95 (Keihin CV)
