Bottom 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...

Piston Kit - 96.93 Mm - Yamaha 23958A Yamaha -- YZ 450 F -- (2017, 2014, 2015, 2016); Yamaha -- YZ 450 FX -- (2017, 2018, 2016); Yamaha -- WR 450 F -- (2017, 2016, 2018)

Modified to handle upgraded stroker flywheels strokeWorks with all stock and high-performance flywheel assembliesMade in the U.S.A.

Assembly sold complete with Hot Rods connecting rodFactory assembled and true to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performanceReady for installationCrankshaft is...

Heavy-duty OE replacement connecting rodsCertified 8620 AISI steel provides superior strengthCrankpins are manufactured from hot-rolled ASTM 4115 and case hardened to 58-62RcFeature the latest in...

Piston Kit - 96.96 Mm - Yamaha 4086Da Yamaha -- YZ 450 F -- (2023, 2024)

Piston Kit - 96.96 Mm - Yamaha 4093Da Yamaha -- YZ 450 F Monster Energy -- (2023); Yamaha -- YZ 450 F -- (2023, 2024)

Piston Kit - 80.95 Mm - Gas Gas | Husqvarna | Ktm 4090Da Husqvarna -- FC 250 -- (2023, 2024, 2025); Husqvarna -- FE 250 -- (2024); Husqvarna -- FC 250 Rockstar Ed. -- (2024); KTM -- 250 XC-F --...

Piston Kit - 96.94 Mm - Yamaha 23958B Yamaha -- YZ 450 FX -- (2016, 2017, 2018); Yamaha -- YZ 450 F -- (2017, 2016, 2014, 2015); Yamaha -- WR 450 F -- (2017, 2016, 2018)

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...

Piston Kit - 95.96 Mm - Kawasaki Kx450F 24018A Kawasaki -- KX 450 F -- (2015)

Piston Kit - 91.93 Mm - Yamaha Wr/Yz400F 22567A Yamaha -- YZ 400 F -- (1998, 1999); Yamaha -- WR 400 F -- (1998, 1999, 2000)