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JE Pistons

The origins of what we know today as JE Pistons can be traced back to 1912 and the Los Angeles foundry of William Jahns Sr. and his company W.H. Jahns. Employing the tagline, “Nothing but Pistons,” the W.H. Jahns company produced pistons and semi-finished pistons until 1948, when Jahns Sr. retired. Meanwhile, Jahns’ son, William “Uncle Bill” Jahns Jr., started and had been working on his company Jahns’ Racing Pistons since 1947. Shortly after, the business became Jahns’ Engineering Pistons, and was finally shortened to JE Pistons.

Through the following years, JE Pistons’ technology evolved, from mastering casting technology in the 60s to researching and implementing forging technology in the 70s. Numerical Controlled (NC) machines were introduced to manufacturing in the early 80s, which was quickly improved to the use of Computer Numerical Controlled (CNC) machines and a proprietary piston design and machining program in the mid-80s.

JE Pistons has continued to evolve their manufacturing processes, currently offering racing pistons either off the shelf or fully custom. JE pistons are all designed, forged, and machined in-house, allowing control over every step of the piston-making process. JE’s 7+ decades of experience in high-level racing has led to offering premium racing features, including full billet construction, EN plating, and purpose-designed coatings, to name a few.

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JE Pistons 13 KTM SXF450 PRO Piston Kit Quick View
JE Pistons

JE Pistons 13 KTM SXF450 PRO Piston Kit

$329.99
JEP323898
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
JE Pistons 13 KTM SXF450 PRO Piston KitThis Part Fits: Year Make Model Submodel 2013-2015 KTM 450 EXC Base 2013-2016 KTM 450 SX-F Base...
JE Pistons 13 KTM SXF450 PRO Piston Single Quick View
JE Pistons

JE Pistons 13 KTM SXF450 PRO Piston Single

$374.99
JEP323897S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 13 KTM SXF450 PRO Piston Single
JE Pistons 13 KTM SXF450 PRO Piston Kit Quick View
JE Pistons

JE Pistons 13 KTM SXF450 PRO Piston Kit

$329.99
JEP323897
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its range of Pro Series pistons. Pro...
JE Pistons KTM 250SX-F 13.5 Piston Single Quick View
JE Pistons

JE Pistons KTM 250SX-F 13.5 Piston Single

$349.99
JEP323895S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons KTM 250SX-F 13.5 Piston Single
JE Pistons KTM 250SX-F 13.5 Piston Kit Quick View
JE Pistons

JE Pistons KTM 250SX-F 13.5 Piston Kit

$309.99
JEP323895
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
JE Pistons KTM 250SX-F 13.5 Piston KitThis Part Fits: Year Make Model Submodel 2014-2015 Husqvarna FC250 Base 2013-2015 KTM 250 SX-F Base
JE Pistons Yamaha YZ250F Piston Single Quick View
JE Pistons

JE Pistons Yamaha YZ250F Piston Single

$349.99
JEP323558S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Yamaha YZ250F Piston Single
JE Pistons Yamaha YZ250F Piston Single Quick View
JE Pistons

JE Pistons Yamaha YZ250F Piston Single

$349.99
JEP323557S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Yamaha YZ250F Piston Single
JE Pistons Yamaha YZ250F Piston Kit Quick View
JE Pistons

JE Pistons Yamaha YZ250F Piston Kit

$309.99
JEP323557
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
JE Pistons Yamaha YZ250F Piston KitThis Part Fits: Year Make Model Submodel 2015-2017 Yamaha WR250F Base 2014-2018 Yamaha YZ250F Base 2015-2019 Yamaha YZ250FX Base...
JE Pistons Yamaha YZ250F Piston Single Quick View
JE Pistons

JE Pistons Yamaha YZ250F Piston Single

$349.99
JEP323556S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Yamaha YZ250F Piston Single
JE Pistons Yamaha YZ250F Piston Kit Quick View
JE Pistons

JE Pistons Yamaha YZ250F Piston Kit

$309.99
JEP323556
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
JE Pistons Yamaha YZ250F Piston KitThis Part Fits: Year Make Model Submodel 2015-2017 Yamaha WR250F Base 2014-2018 Yamaha YZ250F Base 2015-2019 Yamaha YZ250FX Base...
JE Pistons Honda VTX 1300 Kit Piston Single Quick View
JE Pistons

JE Pistons Honda VTX 1300 Kit Piston Single

$314.99
JEP321505S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Honda VTX 1300 Kit Piston Single
JE Pistons Honda VTX 1300 Kit Piston Kit Quick View
JE Pistons

JE Pistons Honda VTX 1300 Kit Piston Kit

$519.99
JEP321505
Engine Components JE Pistons Misc Powersports Piston Sets - Powersports Uncategorized
As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons...
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