Introduced in 1999 primarily for the NASCAR circuit and currently available for limited applications, JESEL’S Pro-J2K Series are a lightweight, high-end alternative to our standard Pro Series line. All J2K rocker arms are manufactured from a custom blend, shotpeen finished aluminum alloy for durability and cycle life needed at elevated operating temperatures experienced in endurance racing. The use of this material in conjunction with the dual diameter modular shaft provides for an extremely lightweight yet rigid rocker arm. This unique shaft design allows the JESEL engineers to use a .562” O.D. shaft bearing to increase the critical bearing strap area needed to reduce body deflection. This same shaft also allows for .750” diameter clamping area and provides enough room for a 7/16” mounting stud to securely fasten the rocker to the mounting stand. All J2K rockers come standard with a .250” needle nose roller and can be fitted with our Tool Steel Ball Adjuster which adds over .100” worth of critical thread area.
As a spin-off from this technology, JESEL has developed a super light yet durable rocker system geared towards the sprint car community. By combining the J2K rocker assemblies along with an aluminum mounting stand, the JESEL engineers have developed a complete V8 rocker kit that weighs in at a scant 12 lbs. The aluminum mounting stands can be machined and fitted for a valve spring oiling option to cool the springs for extended spring life.
Pro-J2K MoHawk 3/8" Ball Adjuster.650" Thread Length.375" Rear Strap.460" Front Strap
Pro Big Bore Standard Slot 3/8" Cup Adjuster.525" Thread Length.220" Rear Strap.340" Front Strap
Valvetrain mass is critically important at extreme RPM. With less mass on the valve tip, a gain in rpm can be achieved without the need to increase spring pressure. Not only are the JESEL MoHawks lighter, they are stiffer and stronger than traditional top-slotted rockers. Through extensive research JESEL has found it can size each MoHawk rocker arm beam section by application and spring pressure. The result is an optimized rocker arm for your individual application. Your engine's valvetrain will be capable of more rpm, and spring life will be increased as well. Typical applications are shown below.
.125" Beam Up to 200 lbs seat pressure
.187" Beam Up to 300 lbs seat pressure
.250" Beam Up to 400 lbs seat pressure
.350" Beam Up to 500 lbs seat pressure
Solid Beam Severe Duty
WE'VE NOW EXTENDED OUR ENGINEERING AND DESIGN SERVICES DIRECTLY TO OUR CUSTOMERS!
SERVICES INCLUDE - Faro Arm Mapping - Solid Works Engineering - Finite Element Analysis -Rapid Prototyping - Spectroscopic Analysis - 5 Axis CNC Machining - Laser Engraving
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Rocker Arms - Sportsman Series Rocker Arms - Pro Series Rocker Arms - Pro J2K Series Rocker Arms - Pro Steel Series Rocker Arms
Lifters - Solid Body Tie Bar Roller Lifters - TS Series Dog Bone Roller Lifters - TS Series Tie Bar Roller Lifters - TS Series Keyway Roller Lifters - Bushings & Retainer Kits
V-Twin - Rocker Arms - Roller Lifters - Pushrods - Components
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Jesel Inc. 1985 Cedar Bridge Ave. Suite 2 Lakewood, NJ 08701
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