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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 2020 Kawasaki TERYX KRX 100 Piston Kit

$634.99
JEP378851
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 17-20 Kawasaki NINJA 650 - 83MM/12.0 to 1 Piston Single

$314.99
JEP378826S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 17-20 Kawasaki NINJA 650 - 83MM/12.0 to 1 Piston Single
Quick View
JE Pistons

JE Pistons 17-20 Kawasaki NINJA 650 - 83MM/12.0 to 1 Piston Kit

$524.99
JEP378826
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 17-20 Kawasaki NINJA 650 - 83MM/10.8 to 1 Piston Single

$314.99
JEP378825S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 17-20 Kawasaki NINJA 650 - 83MM/10.8 to 1 Piston Single
Quick View
JE Pistons

JE Pistons 17-20 Kawasaki NINJA 650 - 83MM/10.8 to 1 Piston Kit

$524.99
JEP378825
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...
JE Pistons Kawasaki NINJA 300 12.5 to 1 Piston Single Quick View
JE Pistons

JE Pistons Kawasaki NINJA 300 12.5 to 1 Piston Single

$314.99
JEP374023S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Kawasaki NINJA 300 12.5 to 1 Piston Single
JE Pistons Kawasaki NINJA 300 12.5 to 1 Piston Kit Quick View
JE Pistons

JE Pistons Kawasaki NINJA 300 12.5 to 1 Piston Kit

$524.99
JEP374023
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 Honda CRF 250R 14.4 to 1 Piston Single

$389.99
JEP373035S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2020 Honda CRF 250R 14.4 to 1 Piston Single
Quick View
JE Pistons

JE Pistons 2020 Honda CRF 250R 14.4 to 1 Piston Kit

$389.99
JEP373035
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...
JE Pistons 2020 Honda CRF 250R 14.0 to 1 Piston Single Quick View
JE Pistons

JE Pistons 2020 Honda CRF 250R 14.0 to 1 Piston Single

$389.99
JEP373034S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons 2020 Honda CRF 250R 14.0 to 1 Piston Single
JE Pistons 2020 Honda CRF 250R 14.0 to 1 Piston Kit Quick View
JE Pistons

JE Pistons 2020 Honda CRF 250R 14.0 to 1 Piston Kit

$389.99
JEP373034
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...
JE Pistons Yamaha YZF R3 13 to 1 Piston Single Quick View
JE Pistons

JE Pistons Yamaha YZF R3 13 to 1 Piston Single

$314.99
JEP371974S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Yamaha YZF R3 13 to 1 Piston Single
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