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 life Rieju -- MR Racing 300 -- (2021); Gas Gas -- EC 300 --...

Include springs, upper and lower collars and keysFor valve lift to .650" with 1.860"/178 lbs. installed height, 376 lbs. at max liftMax 6500 rpmMade in the U.S.A.

Includes rings, clips and pinEasy-to-follow step-by-step installation instructions Yamaha -- YZ 250 F -- (2014, 2015, 2017, 2016, 2018); Yamaha -- WR 250 F -- (2016, 2017, 2015)

Includes rings, clips and pinEasy-to-follow step-by-step installation instructions Yamaha -- WR 250 F -- (2015, 2016, 2017); Yamaha -- YZ 250 F -- (2015, 2014, 2017, 2016, 2018)

Athena Piston Kit With Gaskets - 77.96 Mm - Fe250 | 250Excf/Xcfw P5F0780074001B KTM -- 250 EXC-F -- (2015, 2014, 2016); KTM -- 250 XCF-W Six Days -- (2016, 2014, 2015); KTM -- 250 XCF-W -- (2014, 2015, 2016); KTM -- 250 XCF-W 4-Stroke -- (2015, 2016,...

Athena Piston Kit With Gaskets - 77.95 Mm - Fe250 | 250Excf/Xcfw P5F0780074001A KTM -- 250 EXC-F -- (2015, 2014, 2016); KTM -- 250 XCF-W 4-Stroke -- (2014, 2016, 2015); KTM -- 250 XCF-W Six Days -- (2014, 2015, 2016); KTM -- 250 EXC-F Six Days -- (2014,...

Top End Piston Kit - 76.96 Mm - Kawasaki Kx250F Vtktc23646B Kawasaki -- KX 250 F -- (2012, 2014, 2013, 2011)

Top End Piston Kit - 76.96 Mm - Kawasaki Kx250F Vtktc23566B Kawasaki -- KX 250 F -- (2010)

Top End Piston Kit - 76.96 Mm - Suzuki Rmz250 Vtktc23564B Suzuki -- RM-Z 250 -- (2010, 2011, 2012)

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 piston kits are gravity cast aluminum alloy (not...

Top End Piston Kit - 76.95 Mmm - Yamaha Yz250F Vtktc22805B Yamaha -- YZ 250 F -- (2003, 2001, 2002, 2004)

Piston Kit - 95.95 Mm - Honda Trx450R/Er 23549A Honda -- TRX450ER -- (2009, 2006, 2008, 2013, 2014, 2012, 2007); Honda -- TRX450R -- (2008, 2009, 2006, 2007)