Restore your Yamaha 85 YZ engine performance with the Athena P4C0475089003B Top End Piston Kit. Designed specifically for Yamaha 85 YZ models from 2002-2018, this complete rebuild solution includes a precision-engineered 47.45 mm cast piston and matching top end gasket kit for reliable sealing and long-lasting durability. Athena develops and tests its piston technology and gasket components together to ensure optimal compatibility, improved reliability, and consistent performance under demanding motocross and off-road riding conditions. The cast aluminum piston construction provides excellent thermal resistance, reduced wear, and dependable operation for both recreational and competitive riders. This top end rebuild kit is an excellent choice for routine maintenance, engine refresh projects, or performance restoration. Manufactured to high-quality standards, the Athena piston kit helps maintain compression, smooth power delivery, and dependable engine response.
UPGRADE YOUR DIRT BIKE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your modern-era 85cc youth two-stroke racing engine with the Athena Big Bore Cylinder Kit (Part No. P400485100077), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 106cc 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 53mm big bore cylinder, a dedicated modular high-compression cylinder head, updated power valve blades, 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 custom machining or structural engine modifications to your factory crankcase.
If you're looking to unleash more low-end torque, stronger mid-range power, and overall improved performance from your Yamaha YZ125, the Athena S4C05800001B is the perfect choice. Engineered in Italy by one of the world's leading powersports manufacturers, this high-quality cast piston kit is specifically designed to pair with Athena's Big Bore Cylinder Kits, reliably increasing your bike's displacement from 125cc. Whether you're a weekend trail rider, a competitive motocross racer, or someone who simply wants more punch out of your two-stroke, this piston delivers noticeable gains in horsepower and torque while maintaining excellent reliability and throttle response.
If you're looking to unleash more low-end torque, stronger mid-range power, and overall improved performance from your Yamaha YZ125, the Athena S4C05800001A is the perfect choice. Engineered in Italy by one of the world's leading powersports manufacturers, this high-quality cast piston kit is specifically designed to pair with Athena's Big Bore Cylinder Kits, reliably increasing your bike's displacement from 125cc. Whether you're a weekend trail rider, a competitive motocross racer, or someone who simply wants more punch out of your two-stroke, this piston delivers noticeable gains in horsepower and torque while maintaining excellent reliability and throttle response.
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 85cc youth two-stroke engine with the Athena Standard Bore Cylinder Kit (Part No. P400485100076), 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 47.5mm standard bore cylinder, a dedicated high-performance modular cylinder head assembly, premium piston, rings, wrist pin, circlips, and a specific high-tightness gasket set—allowing you to drop compression losses and refresh your engine without requiring any custom machining or structural engine modifications to your factory crankcase.
UPGRADE YOUR RIDE TO THE NEXT LEVEL OF PERFORMANCE Extract massive power, aggressive low-end torque, and unmatched acceleration from your 450cc four-stroke engine with the Athena Big Bore Cylinder Kit (Part No. P400485100016), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 478cc 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 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 250cc four-stroke engine with the Athena Big Bore Cylinder Kit (Part No. P400485100073), a premium race-proven package engineered in Italy to seamlessly convert your factory setup into a high-revving, high-output 304cc 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.
RESTORE YOUR DIRT BIKE TO PEAK OEM PERFORMANCE Bring back the crisp throttle response, razor-sharp power delivery, and factory reliability of your 125cc two-stroke engine with the Athena Standard Bore Cylinder Kit (Part No. P400250100001), 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 54mm standard bore cylinder, a high-performance cast piston assembly, 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 P400210850085 Full Gasket Kit is designed for Honda CR80 and CR85 models from 1992‑2007, providing all essential gaskets needed for dependable engine servicing and rebuilds. Manufactured with premium materials and engineered to meet OEM‑level specifications, this kit ensures proper sealing, durability, and long‑term performance under the demands of motocross and off‑road riding. Ideal for restoring compression, preventing leaks, and keeping your 2‑stroke engine running at peak performance. Oil seals are not included.
The Athena P400210850130 Full Gasket Kit is engineered for Honda ATC 125 models from 1984‑1985, providing all essential gaskets needed for dependable engine servicing and rebuilds. Manufactured with premium materials and cut to OEM‑level precision, this kit ensures proper sealing, durability, and long‑term performance. Ideal for restoring compression, preventing leaks, and keeping classic ATC engines running smoothly. Oil seals are not included.
The Athena P400210850201 Full Gasket Kit is engineered for Honda ATC 200 and TRX 200 models from 1984‑1986, providing all essential gaskets needed for dependable engine servicing and rebuilds. Manufactured with premium materials and precision‑cut to meet OEM‑level specifications, this kit ensures proper sealing, durability, and long‑term performance. Ideal for restoring compression, preventing leaks, and keeping classic Honda ATVs running strong. Oil seals are not included.
The Athena P400210850111 Full Gasket Kit is engineered for Honda ATC 110 models from 1979‑1985, providing all essential gaskets needed for dependable engine servicing and rebuilds. Manufactured with premium materials and cut to OEM‑level precision, this kit ensures proper sealing, durability, and long‑term performance. Ideal for restoring compression, preventing leaks, and keeping classic ATC engines running smoothly. Oil seals are not included.
Athena crankshafts are made of premium materials combined with the latest production technology. They ensure maximum performance with high-powered engines in situations of greater stress. The Athena S410485320002 Crankshaft Assembly is a high-quality direct replacement designed specifically for the Yamaha YZ85 (2002-2018). This STD crankshaft delivers superior durability, smoother power delivery, and enhanced engine longevity thanks to its race-proven engineering, improved balance, and lighter connecting rod. Whether you're rebuilding a stock engine or pushing the limits on the track, this precision-machined crankshaft helps restore or boost your bike’s performance to factory or better levels. Each assembly includes a high-performance needle bearing and special bearing cage.
Athena gaskets are manufactured using advanced materials and production techniques to deliver maximum sealing performance and reliability. The Athena S410195034042 Cam Gear Cover Gasket (10 Pack) is a high-quality replacement specifically designed for Harley-Davidson Sportster motorcycles (1991-2022). These precision-cut gaskets provide an excellent seal on the cam gear cover, preventing annoying oil leaks while withstanding the intense heat, pressure, and vibration common in Harley V-twin engines. This bulk 10-pack offers outstanding value for shops, serious riders, and builders who service multiple bikes or perform frequent maintenance. Each gasket is engineered to meet or exceed strict OEM specifications for perfect fitment and long-lasting performance.
Keep your Honda 450 CRF-X running cool and leak-free with the Athena P400210475011 Water Pump Repair Kit. Engineered specifically for Honda 450 CRF-X models from 2005-2017, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400210475011 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Honda 450 CRF-R running cool and leak-free with the Athena P400210475009 Water Pump Repair Kit. Engineered specifically for Honda 450 CRF-R models from 2002-2008, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400210475009 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Honda 250 CRF-R running cool and leak-free with the Athena P400210475007 Water Pump Repair Kit. Engineered specifically for Honda 250 CRF-R models from 2004-2009, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400210475007 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Honda 150 CRF-R running cool and leak-free with the Athena P400210475004 Water Pump Repair Kit. Engineered specifically for Honda Honda 150 CRF-R models from 2007-2021, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400210475004 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Honda 125 CR-R running cool and leak-free with the Athena P400210475002 Water Pump Repair Kit. Engineered specifically for Honda 125 CR-R models from 1990-2004, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400210475002 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Yamaha 450 WR-F / YZ-F running cool and leak-free with the Athena P400485475008 Water Pump Repair Kit. Engineered specifically for Yamaha 450 WR-F / YZ-F models from 2006-2014, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400485475004 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Suzuki 250 RMZ running cool and leak-free with the Athena P400510470005 Water Pump Repair Kit. Engineered specifically for Suzuki 250 RMZ models from 2007-2015, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400510470005 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Suzuki 250 RM running cool and leak-free with the Athena P400510475002 Water Pump Repair Kit. Engineered specifically for Suzuki 250 RM models from 2001-2008, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400510475004 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Yamaha 65 / 85 YZ running cool and leak-free with the Athena P400485475013 Water Pump Repair Kit. Engineered specifically for Yamaha 65 / 85 YZ models from 2018-2023, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400485475004 kit provides a durable and cost-effective solution for your dirt bike.
Keep your Yamaha 125 YZ running cool and leak-free with the Athena P400485475004 Water Pump Repair Kit. Engineered specifically for Yamaha 125 YZ models from 2005-2023, this premium-quality rebuild kit includes the essential gaskets, seals, and washers required to restore proper water pump operation and cooling system performance. Athena is recognized worldwide for manufacturing high-performance motorcycle gaskets and engine components trusted by professional mechanics, motocross racers, and off-road enthusiasts. This kit is designed to deliver dependable sealing performance under demanding riding conditions while maintaining OEM-level fit and reliability. Whether you are repairing a leaking water pump, rebuilding your cooling system, or performing preventative maintenance, the Athena P400485475004 kit provides a durable and cost-effective solution for your dirt bike.
