UPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your 65cc youth two-stroke racing engine with the Athena Big Bore Cylinder Kit (Part No. P400250100007), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 80cc powerhouse. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to deliver a substantial increase along the entire power curve while maintaining strict original-equipment reliability. This complete bolt-on kit comes loaded with everything required for a flawless installation—including a precision-machined 50mm big bore cylinder, a dedicated high-compression cylinder head, a premium cast piston assembly, rings, wrist pin, clips, and a specific high-tightness multi-layer gasket set—allowing you to dramatically increase track performance without requiring any machining or structural engine modifications to your factory crankcase.
UPGRADE YOUR PIT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your 110cc pit bike engine with the Athena Big Bore Cylinder Kit (Part No. P400250100005), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 130cc powerhouse. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to deliver a substantial increase along the entire power curve while maintaining strict original-equipment reliability. This complete bolt-on kit comes loaded with everything required for a flawless installation—including a precision-machined aluminum big bore cylinder, a high-performance forged piston coated with molybdenum, premium rings, wrist pin, clips, and a specific high-tightness multi-layer gasket set—allowing you to dramatically increase track and trail performance without requiring any machining or structural engine modifications to your factory crankcase.
UPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your 125cc two-stroke racing engine with the Athena Big Bore Cylinder Kit (Part No. P400250100011), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 144cc powerhouse. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to deliver a substantial increase along the entire power curve while maintaining strict original-equipment reliability. This complete bolt-on kit comes loaded with everything required for a flawless installation—including a precision-machined 58mm big bore cylinder, a dedicated high-compression cylinder head, updated power valve hardware, a premium cast piston assembly, rings, wrist pin, clips, and a specific high-tightness multi-layer gasket set—allowing you to dramatically increase track performance without requiring any machining or structural engine modifications to your factory crankcase.
RESTORE YOUR DIRT BIKE TO PEAK OEM PERFORMANCE Bring back the crisp throttle response, razor-sharp power delivery, and high-revving factory reliability of your 65cc youth two-stroke racing engine with the Athena Standard Bore Cylinder Kit (Part No. P400250100006), a premium OEM-style replacement package engineered and manufactured in Italy. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to match or exceed original equipment standards across the entire powerband. This complete bolt-on kit comes fully loaded with everything required for a flawless top-end overhaul—including a precision-machined 44.5mm standard bore cylinder, a dedicated high-compression cylinder head, a premium cast piston assembly, rings, wrist pin, circlips, and a specific high-tightness gasket set—allowing you to drop compression losses and completely refresh your machine without requiring any custom machining or structural engine modifications to your factory crankcase.
RESTORE YOUR SPORT ATV TO PEAK OEM PERFORMANCE Bring back the crisp throttle response, razor-sharp power delivery, and factory reliability of your 450cc four-stroke sport ATV engine with the Athena Standard Bore Cylinder Kit (Part No. P400250100009), a premium OEM-style replacement package engineered and manufactured in Italy. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to match or exceed original equipment standards across the entire RPM range. This complete bolt-on kit comes fully loaded with everything required for a flawless top-end rebuild—including a precision-machined 96mm standard bore cylinder, a high-performance forged piston assembly coated with molybdenum, premium rings, wrist pin, circlips, and a specific high-tightness gasket set—allowing you to drop compression losses and refresh your engine without requiring any machining or structural engine modifications to your factory crankcase.
The Athena S410195149021 Primary Cover Gasket is a premium replacement gasket designed for Harley‑Davidson 1340cc Shovelhead models from 1981–1988. Built from high‑quality materials and precision‑cut to OEM‑level specifications, this .030" gasket provides a reliable seal between the primary cover and engine case to help prevent leaks and maintain smooth primary drive operation. This listing includes a 10‑pack, making it ideal for service shops, restoration specialists, or riders who regularly maintain classic Shovelhead models.
The Athena S410195149037 Gasket is a high‑quality replacement gasket designed for Harley‑Davidson Sportster 883 and 1200cc Evolution models from 2004–2009. Constructed using Meta‑Foam, a premium multi‑layer material engineered for superior sealing, this gasket provides excellent resistance to heat, oil, and deformation. It ensures a reliable seal between the primary cover and engine case, helping prevent leaks and maintaining smooth primary drive operation. This item is sold individually, ideal for routine service or single‑bike maintenance.
UPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your 250cc four-stroke engine with the Athena Big Bore Cylinder Kit (Part No. P400210100009), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 280cc powerhouse. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to deliver a substantial increase along the entire power curve while maintaining strict original-equipment reliability. This complete bolt-on kit comes loaded with everything required for a flawless installation—including a widened water-jacket aluminum cylinder, a high-performance forged piston coated with molybdenum, premium rings, wrist pin, clips, and a specific high-tightness multi-layer gasket set—allowing you to dramatically increase track performance without requiring any machining or structural engine modifications to your factory crankcase.
The Athena S410195149001 Primary Cover Gasket is a high‑quality replacement gasket designed for Harley‑Davidson Sportster models from 1977–1990. Manufactured with premium materials for long‑lasting durability, this gasket ensures a proper seal between the primary cover and engine case to prevent leaks and maintain smooth primary system operation. This listing includes a 10‑pack, ideal for shops, service departments, or riders who perform frequent maintenance on vintage Sportster models.
UPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your 230cc four-stroke engine with the Athena Big Bore Cylinder Kit (Part No. P400210100054), a premium trail-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 240cc powerhouse. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to deliver a substantial increase along the entire power curve while maintaining strict original-equipment reliability. This complete bolt-on kit comes loaded with everything required for a flawless installation—including an advanced aluminum big bore cylinder, a high-performance forged piston coated with molybdenum, premium rings, wrist pin, clips, and a specific high-tightness multi-layer gasket set—allowing you to dramatically increase trail performance without requiring any machining or structural engine modifications to your factory crankcase.
UPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your 250cc four-stroke engine with the Athena Big Bore Cylinder Kit (Part No. P400210100067), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 290cc (289cc actual) powerhouse. Utilizing an innovative co-fusion production process that integrates a heavy-duty steel sleeve directly into an aluminum outer casting, this unique cylinder maximizes internal bore geometry without requiring structural modifications or machining to your factory crankcase. Lined with a high-durability galvanic nickel-silicon treatment, this setup ensures maximum heat dissipation, reduced mechanical friction, and optimal wear resistance. The complete bolt-on kit comes fully loaded with everything needed for installation—including the advanced hybrid cylinder, a lightweight box-bridged forged piston coated in friction-reducing molybdenum disulfide, a biconical DLC-coated wrist pin, premium rings, wire locks, and a multi-layer high-tightness gasket set—delivering full-bodied torque across all steady states while preserving your bike's agile handling.
UPGRADE YOUR SCOOTER TO THE NEXT LEVEL OF PERFORMANCE Extract maximum power and unmatched acceleration from your 50cc scooter with the Athena Big Bore Cylinder Kit (Part No. 070100), a premium performance package engineered in Italy to seamlessly convert your factory engine into a high-revving, high-output 70cc powerhouse. Entirely cast from high-grade aluminum and treated with a specialized Motor-Nicksil (Nickel-Silicon) coating, this cylinder guarantees exceptional thermal dissipation, minimal friction, and optimal wear resistance to deliver a substantial increase along the entire power curve while maintaining strict reliability. This complete bolt-on kit comes loaded with everything required for a flawless installation—including a precision-machined aluminum cylinder, a matching high-compression cylinder head, a premium domed-head piston with a 10mm wrist pin, rings, and a specific high-tightness gasket set—allowing you to dramatically increase top-end speed and low-end torque without requiring any structural engine modifications to your original factory crankcase.
The Athena R2706‑081 Race Gasket Kit is engineered for maximum sealing performance in KTM 450 SX‑F models from 2016–2024. Designed for racing and high‑output applications, this kit includes a premium cylinder head gasket and two cylinder base gaskets to accommodate different deck‑height and compression setups. Manufactured with advanced materials and built to precise specifications, Athena race gaskets deliver superior durability, improved sealing, and consistent performance under extreme motocross and off‑road conditions.
The Athena P400510850800 Full Gasket Kit provides a complete, high‑quality sealing solution for Suzuki GS850 engines from 1979–1981. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets needed for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for riders maintaining or restoring these classic air‑cooled inline‑four touring motorcycles.
The Athena P400510850753 Full Gasket Kit provides a complete, high‑quality sealing solution for Suzuki GSX‑R750 (2000–2003) and GSX‑R1000 (2001–2002) engines. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets needed for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for riders maintaining or rebuilding these iconic high‑performance sport bikes.
The Athena P400510850034 Full Gasket Kit provides a complete, high‑quality sealing solution for Suzuki RM85 two‑stroke engines from 2002–2022. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets needed for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for youth motocross racers, off‑road riders, and anyone maintaining or refreshing the RM85’s proven mini‑class platform.
The Athena P400510850999 Full Gasket Kit provides a complete, high‑quality sealing solution for Suzuki GSX‑R1300 engines from 1999–2003. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets required for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for riders maintaining or rebuilding these powerful, high‑performance inline‑four motorcycles.
The Athena P400510850700 Full Gasket Kit provides a complete, high‑quality sealing solution for Suzuki GS750 engines from 1977–1980. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets needed for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for riders restoring or maintaining these classic air‑cooled four‑cylinder motorcycles.
The Athena P400510850140 Full Gasket Kit provides a complete, high‑quality sealing solution for Suzuki RM125 two‑stroke engines from 1998–2000. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets needed for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for motocross racers, off‑road riders, and anyone maintaining or restoring these responsive, high‑revving RM125 models.
The Athena P400510600257 Top End Gasket Kit provides a high‑quality sealing solution for Suzuki LT250 and Ozark 250 ATVs from 1987–2014. Designed to OEM‑level specifications, this kit includes all essential top‑end gaskets needed for cylinder, head, and valve‑related service. Built from premium materials for long‑lasting durability, Athena gaskets help restore proper compression, prevent leaks, and maintain reliable performance for trail riding, utility work, and everyday ATV use.
The Athena P400510850030 Full Gasket Kit provides a complete, high‑quality sealing solution for Suzuki RM125 two‑stroke engines from 2001–2007. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets needed for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for motocross racers, off‑road riders, and anyone maintaining or restoring these lightweight, high‑revving RM125 models.
The Athena P400485900213 Complete Gasket Kit provides a full, high‑quality sealing solution for Yamaha YZ450F engines from 2020–2022. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major top‑end and bottom‑end gaskets required for a complete engine rebuild. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for motocross racers, off‑road riders, and anyone maintaining Yamaha’s championship‑proven 450cc platform.
The Athena P400485900212 Complete Gasket Kit provides a full, high‑quality sealing solution for Yamaha YZ250F and WR250F 4‑stroke engines. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major gaskets required for both top‑end and bottom‑end service. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for motocross racers, trail riders, and anyone maintaining or rebuilding Yamaha’s proven 250cc 4‑stroke platforms.
The Athena P400485850900 Full Gasket Kit provides a complete, high‑quality sealing solution for Yamaha XV920 engines from 1981–1983. Manufactured with premium materials and engineered to OEM‑level specifications, this kit includes all major engine gaskets needed for a full rebuild—excluding oil seals. Designed to restore proper sealing, prevent leaks, and ensure long‑lasting durability, Athena gaskets deliver dependable performance for riders restoring or maintaining these classic Yamaha V‑twin motorcycles.
