Racing shock absorber specific for the front axle of Piaggio Zip, developed for Competition (only track use) YAT has separate tank, pressurized by Nitrogen gas, with oil/gas piston separator, steel body and rod, with lower attachment head in alluminium alloy Adjustments: - Micrometric alluminium ring for spring preload - Rebound (continuous adjuster) - Compression (clicking knob on the top of tank, range 12 click) NOTE: Package is delivery with additional spare spring (with higher K rigidity rate), for better setting in track use Compatible with: - Piaggio: ZIP SP 01-_S