Top End

• Built to the tightest tolerances for the ultimate combination of performance and strength • Kit includes piston rings, wrist pin, and circlips - Gas Gas MC 450F (2022, 2021, 2023); Gas Gas MC 450F Troy Lee Designs (2022); Gas Gas EX 450F (2021, 2022,...

• Built to the tightest tolerances for the ultimate combination of performance and strength • Kit includes piston rings, wrist pin, and circlips - Gas Gas EC 500F (2024); Husqvarna FE 501 (2021, 2020, 2022); Husqvarna FE 501 S (2023, 2020, 2021, 2022,...

• Built to the tightest tolerances for the ultimate combination of performance and strength • Kit includes piston rings, wrist pin, and circlips - Beta 430 RR 4T (2016, 2020, 2025, 2021, 2017, 2023, 2024, 2015, 2018, 2019)

• ArmorFit proprietary coating technology conforms to bore and reduces operating friction and noise • AmorX coating is applied to piston crown, ring grooves, and pin bore through the proprietary electrochemical-process and materials • Greatly increased...

• ArmorFit proprietary coating technology conforms to bore and reduces operating friction and noise • AmorX coating is applied to piston crown, ring grooves, and pin bore through the proprietary electrochemical-process and materials • Greatly increased...

• ArmorFit proprietary coating technology conforms to bore and reduces operating friction and noise • AmorX coating is applied to piston crown, ring grooves, and pin bore through the proprietary electrochemical-process and materials • Greatly increased...

• All Wiseco pistons are forged from aerospace aluminum alloys on Wiseco’s state-of-the-art forging presses • Built on a legacy of championships for over 60 years by American craftsmen • Wiseco pistons have the latest dyno-tested technology to...

• 12-point heat-treated 8740 chrome moly steel and black oxide finish • Precision engineered rolled threads • Even load distribution with enhanced underhead flange • Unmatched strength that surpasses grade 8 fasteners • Made in the USA - Harley-Davidson...

1200 CYL 88-03 XL BLACKREPLACEMENT CYLINDERS FOR XL EVOLUTION-STYLE MOTORSReplacement cylinders feature ductile cast-iron sleeves in aluminum castingsSleeve has external ribs that "lock" the sleeve to the aluminum casting so it cannot moveExcellent for...

1340 CYL 84-99 EVO BLACKREPLACEMENT CYLINDERS FOR EVOLUTION-STYLE MOTORSReplacement cylinders feature ductile cast-iron sleeves in aluminum castingsSleeve has external ribs that "lock" the sleeve to the aluminum casting so it cannot moveExcellent for...

CYLINDER NAT 86-03 1200XLREPLACEMENT CYLINDERS FOR XL EVOLUTION-STYLE MOTORSReplacement cylinders feature ductile cast-iron sleeves in aluminum castingsSleeve has external ribs that "lock" the sleeve to the aluminum casting so it cannot moveExcellent for...

CYLINDER TC88 3.75 BLK HLREPLACEMENT CYLINDERSOEM black texture powdercoat with highlighted finsExcellent for stock replacementCylinders are finished slightly undersized so they may be finish-honed to fit your pistonsSold each (unless noted)