Feature: 1. OEM numbers for reference are 90601 KA5, 13111 KCY 670, 13103 KCY 670, 13101 KCY 670, 13021 KCY 670, 13011 KCY 670, 12251 HN1 003, 12191 KCY 672, 12100 KCY 670, 12100 HN1 A70, etc. 2. Vehicle Fitment: Replacement for Sportrax 400 1999‑2008; Replacement for TRX400X 2009‑2014; Replacement for XR400R 1996‑2004. 3. High Strength Cylinder: Made of aluminum alloy material, the cylinder is solid, wearproof, heat resistant, not easy to deform and crack. 4. Long Service Life: 440cc big bore cylinder can work reliably under harsh conditions, with simple operation, convenient control and long service life. 5. Exquisite Workmanship: Professional manufacturing, compact structure, high performance, strong reliability, making sure safety use. Specification: Item Type: Cylinder Piston Kit Material: Aluminum Alloy OE: 90601 KA5, 91302-500-000, 91302-216-000, 91301 MG2 791, 91301 MG2 790, 91301-428-003, 90601 KA5 000, 13111 KCY 670, 13103 KCY 670, 13101 KCY 670, 13021 KCY 670, 13011 KCY 670, 12251 HN1 003, 12191 KCY 672, 12100 KCY 670, 12100 HN1 A70 Fitment: Replacement for Sportrax 400 1999-2008 Replacement for TRX400X 2009-2014 Replacement for XR400R 1996-2004. Package List: 1 x Cylinder Piston Kit (14pcs) Note: 1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!