Check the listing for details. Yamaha YFZ 450 525cc Engine Kit 100mm Big Bore with +3mm Crank 2004-2013. Condition: New other (see details). Listed at 1399.00 USD. This is a complete kit including crank, cylinder, piston and gaskets to build a 525cc motor for YFZ450 (carb models) from 2004-2013. Complete bolt on kit includes a +3mm crank, 100mm cylinder, CP 100mm Piston kit, and Cometic gaskets.Custom designed CP piston is a light weight design, with 14:1 compression, and built in clearances for big valves, big cams, and stroker cranksCometic gasket kit includes head and base gaskets. (always check all clearances during assembly to ensure proper specs due to factory variances)Proprietary cylinder machining increase gasket sealing to eliminate head gasket issuesUtilizes custom steel sleeve for maximum strength (steel is much stronger than aluminum cylinder with coatings. This is the reason all major auto manufactures have aluminum blocks with steel sleeves!!!!)Designed with additional piston skirt support improving piston and cylinder wearBuilt in clearance for large stroker cranksBolts on with no case modificationBetter ring seal and less blow by equals more powerExcellent cooling characteristics for the most demanding racing situationsLast longer and is more reliable (no coatings to flake off)Great option to fix damaged stock cylinders, and if sleeve becomes damaged a new one can be installed quicklyRetains 100% stock OEM look for a stealthy engine build Cylinder and piston designed with clearance for stroker cranks! This item requires customer to send in a cylinder for a core, or pay a $250 core charge. Before purchasing contact us for current lead time (bad cores might require additional parts or service). For questions or to pay for item using Visa/Master card contact us. For any and all installation, tuning or general questions please reach out and contact us. We have unmatched expertise and can help out to answer or solve any issues and pride ourselves in excellent customer service. Normal 0 false false false EN-US X-NONE X-NONEThis is a complete kit including crank, cylinder, piston and gaskets to build a 525cc motor for YFZ450 (carb models) from 2004-2013. Complete bolt on kit includes a +3mm crank, 100mm cylinder, CP 100mm Piston kit, and Cometic gaskets.Custom designed CP piston is a light weight design, with 14:1 compression, and built in clearances for big valves, big cams, and stroker cranksCometic gasket kit includes head and base gaskets. (always check all clearances during assembly to ensure proper specs due to factory variances)Proprietary cylinder machining increase gasket sealing to eliminate head gasket issuesUtilizes custom steel sleeve for maximum strength (steel is much stronger than aluminum cylinder with coatings. This is the reason all major auto manufactures have aluminum blocks with steel sleeves!!!!)Designed with additional piston skirt support improving piston and cylinder wearBuilt in clearance for large stroker cranksBolts on with no case modificationBetter ring seal and less blow by equals more powerExcellent cooling characteristics for the most demanding racing situationsLast longer and is more reliable (no coatings to flake off)Great option to fix damaged stock cylinders, and if sleeve becomes damaged a new one can be installed quicklyRetains 100% stock OEM look for a stealthy engine build Cylinder and piston designed with clearance for stroker cranks! This item requires customer to send in a cylinder for a core, or pay a $250 core charge. Before purchasing contact us for current lead time (bad cores might require additional parts or service). For questions or to pay for item using Visa/Master card contact us. For any and all installation, tuning or general questions please reach out and contact us. We have unmatched expertise and can help out to answer or solve any issues and pride ourselves in excellent customer service. Normal 0 false false false EN-US X-NONE X-NONE