Top End

All pistons are heat treated with a T-5 hardening and tempering cycleAll piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston lifeCast...

Manufactured from high-strength, T-5 heat-treated, 390 hypereutectic aluminum alloyAllows a tighter fit and longer piston and ring lifeDiamond-machined pistons are held to plus or minus one gram...

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond? intake valvesExtend the life of the valvetrain and intake components by...

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond intake valvesExtends the life of the valvetrain and intake components by...

Athena Piston Kit With Gaskets - 77.95 Mm - Ec250F | Fe250 | 250Excf P5F0780093001A Gas Gas -- EC 250F -- (2022, 2021); Husqvarna -- FE 250 -- (2022, 2020, 2021); KTM -- 250 EXC-F -- (2020, 2021,...

For shim-adjusted vehicles

Stainless steel conversion kit includes only what's needed to convert your head to the long-life stainless steel Black Diamond™ intake valvesExtend the life of the valvetrain and intake components by...

2-stoke pistons include piston, rings, pin and clipsPiston made with high quality, permanent skirt coating to reduce friction and piston rock for quiet and improved performance4032 T6 Forged Aluminum...

Kibblewhite Spring Kit 40-41600 Kawasaki -- KX 250 F -- (2020, 2021)

Kibblewhite Spring Kit 30-33600 Honda -- CRF250R -- (2018, 2020, 2019, 2021); Honda -- CRF250RX -- (2018, 2019, 2020, 2021)

• Replacement piston kits for M-Spec big bore cylinder • 4-stroke pistons are made using a double-bridged forging design • Lightweight pistons with the tightest piston-wall clearances in the industry...

Piston Kit - 88.95 Mm - Honda Cr500R 22447 Honda -- CR500R -- (1990, 1985, 1991, 1993, 1988, 1995, 1989, 1996, 1998, 1987, 1997, 2000, 1992, 1994, 1986, 2001, 1999)