* This is the Replacement Carburetor Spacer for the 50SX engine using the 40B. This sleeve fits over the neck of the #40B carb and into the crankcase. FEATURES: Brass construction INCLUDES: One carburetor spacer REQUIRES: Nothing. This is a direct replacement part. SPECS: Outer diameter: 15mm (0.59") Inner diameter: 13.6mm (0.54") Height: 9.2mm (0.36") COMMENTS: This sleeve is needed specifically for the 40B carb because the 40B has screw holes in the neck, however the 50SX uses a pinch bolt to hold the carb to the crankcase. cmc 01/11/02 ir/kh