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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 Yamaha YZ450F PRO SERIES 13.8 to 1 Piston Kit

$314.99
JEP366828
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 RM-Z 250 PRO SERIES Piston Single

$299.99
JEP366827S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons RM-Z 250 PRO SERIES Piston Single
Quick View
JE Pistons

JE Pistons RM-Z 250 PRO SERIES Piston Kit

$299.99
JEP366827
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 Yamaha YZ450F PRO SERIES 13.5 Piston Single

$314.99
JEP366511S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Yamaha YZ450F PRO SERIES 13.5 Piston Single
Quick View
JE Pistons

JE Pistons Yamaha YZ450F PRO SERIES 13.5 Piston Kit

$314.99
JEP366511
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 Yamaha YZ450F PRO SERIES 13.5 Piston Single

$314.99
JEP366510S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons Yamaha YZ450F PRO SERIES 13.5 Piston Single
Quick View
JE Pistons

JE Pistons Yamaha YZ450F PRO SERIES 13.5 Piston Kit

$314.99
JEP366510
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 KTM 450 SX-F 2017+ Piston Single

$314.99
JEP366508S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons KTM 450 SX-F 2017+ Piston Single
Quick View
JE Pistons

JE Pistons KTM 450 SX-F 2017+ Piston Kit

$329.99
JEP366508
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 KTM 450 SX-F 2017+ Piston Single

$314.99
JEP366507S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons KTM 450 SX-F 2017+ Piston Single
Quick View
JE Pistons

JE Pistons KTM 450 SX-F 2017+ Piston Kit

$329.99
JEP366507
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 KTM 250SX-F PRO SERIES 14.5 Piston Single

$299.99
JEP366506S
Engine Components JE Pistons Misc Powersports Pistons - Forged - Single
JE Pistons KTM 250SX-F PRO SERIES 14.5 Piston Single
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