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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

JE Pistons 99-08 Honda TRX 400EX - 85MM/10.5 to 1 Piston Kit

$269.99
JEP379165
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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JE Pistons

JE Pistons 2021 Kawasaki KX250 PRO SERIES 78MM/14.5 Piston Single

$314.99
JEP379030S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2021 Kawasaki KX250 PRO SERIES 78MM/14.5 Piston Single
Quick View
JE Pistons

JE Pistons 2021 Kawasaki KX250 PRO SERIES 78MM/14.5 Piston Kit

$314.99
JEP379030
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...
Quick View
JE Pistons

JE Pistons 2021 Kawasaki KX250 PRO SERIES 78MM/14.1 Piston Single

$314.99
JEP379029S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2021 Kawasaki KX250 PRO SERIES 78MM/14.1 Piston Single
Quick View
JE Pistons

JE Pistons 2021 Kawasaki KX250 PRO SERIES 78MM/14.1 Piston Kit

$314.99
JEP379029
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...
Quick View
JE Pistons

JE Pistons 16-20 Polaris RZR XP TURBO-93MM-9.5 to 1 Piston Single

$364.99
JEP378854S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 16-20 Polaris RZR XP TURBO-93MM-9.5 to 1 Piston Single
Quick View
JE Pistons

JE Pistons 16-20 Polaris RZR XP TURBO-93MM-9.5 to 1 Piston Kit

$634.99
JEP378854
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...
Quick View
JE Pistons

JE Pistons 16-20 Polaris RZR XP TURBO-93MM-9.0 to 1 Piston Single

$364.99
JEP378853S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 16-20 Polaris RZR XP TURBO-93MM-9.0 to 1 Piston Single
Quick View
JE Pistons

JE Pistons 16-20 Polaris RZR XP TURBO-93MM-9.0 to 1 Piston Kit

$634.99
JEP378853
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...
Quick View
JE Pistons

JE Pistons 2020 Kawasaki TERYX KRX 1000-92MM/11.5 to 1 Piston Single

$364.99
JEP378852S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2020 Kawasaki TERYX KRX 1000-92MM/11.5 to 1 Piston Single
Quick View
JE Pistons

JE Pistons 2020 Kawasaki TERYX KRX 1000-92MM/11.5 to 1 Piston Kit

$634.99
JEP378852
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...
Quick View
JE Pistons

JE Pistons 2020 Kawasaki TERYX KRX 1000-92MM/9.5 to 1 Piston Single

$364.99
JEP378851S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2020 Kawasaki TERYX KRX 1000-92MM/9.5 to 1 Piston Single
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