1. Replacement Part Number9.110.018 9.100.018 725. Before ing, Please Check For The Details To Make Sure This Part Will Fit.2. FIT FORReplacement For Hammerhead 80T And TrailMaster Mid XRX Mud Head Go Karts With A 6.5hp Engine. 725 Torque Converter Asymmetrical Drive Belt Also Used On Many Kits As Well Trailmaster And Hammerhead Mid Karts. Driver And Driven Pulley Needs To Be Between 6 5/8 Inch And 6 11/16 Inch.3. AdvantageWith The Passage Of Time, The Belt Will Be Loose And Even Broken Due To Wear. Our Product Has The Characteristics Of Wear Resistance And Corrosion Resistance, Which Is Very Suitable For You To Replace The Original Belt, And The Price Is Only Part Of The OEM One.4. High performance725 Torque Converter Asymmetrical Drive Belt Made Of Excellent Quality Rubber Material, Sturdy And In Use, Has The Characteristics Of Wear Resistance And Corrosion Resistance