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JE, Harley Davidson, 3.937 in. Bore, 2 Cyl. Kit

Your Price: $449.99

SKU: 370243

In Stock

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JE, Harley-Davidson, Milwaukee 8, 11.00:1, 3.937 in. Bore, 2 Cyl. Piston Kit

As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over 75 years of experience. JE’s carefully developed line of V-Twin pistons is engineered, forged and machined 100% in the USA and are designed for each specific engine and use application to provide the ultimate combination of durability and performance. From fun and powerful cruisers to all-out V-Twin drag racing, JE Pistons’ performance is proven with every handful of throttle. Equip your bike with the best in forged pistons.

  • Forged in the USA using 2618 aluminum, yielding high tensile strength needed for high-demand performance applications
  • Designed specifically for each engine and use application to provide optimized performance durability
  • Proprietary Forged Side Relief (FSR) forging design minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin
  • Includes high-quality wrist pins, locks, and JE Pro Seal premium piston rings
  • Made 100% in the USA
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GTIN: 00193564219473

Piston Series

JE Pistons
Cylinder Head

MILWAUKEE 8
Bore Diameter

100.00 MM
Compression Ratio Actual

11.00:1
Piston Head Type

Dome
Compression Height

1.143 IN
Piston Volume

7.90 CC
Piston Material

2618
Forging Type

Round
Piston Average Weight

395 GR
Ring Set Included

Yes
Top Compression Ring Thickness

0.0472 IN
Second Compression Ring Thickness

0.0472 IN
Oil Ring Thickness

0.0984 IN
Wrist Pin Outer Diameter

0.927 IN
Wrist Pin Length

2.500 IN
Wrist Pin Wall Thickness

0.150 IN

Years

2020
2019
2018
2017

Makes

Harley Davidson

Models

FLDE Deluxe 107
FLFB Fat Boy 107
FLHC Heritage Classic 107
FLHR Road King
FLHRXS Road King Special
FLHT Electra Glide Standard
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Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine.
Note: For pistons BELOW the block @ TDC – value in box must be a NEGATIVE number (-0.000)
Note: For pistons ABOVE the block @ TDC – value in box must be a POSITIVE number (0.000)
Note: For a DISH piston – value in box must be a NEGATIVE number (-0.0)
Note: For a DOME piston – value in box must be a POSITIVE number (0.0)
Note: Manipulate the DOME/DISH & PISTON to DECK volumes to get the ratio you want.
Enter the number of cylinders of your engine
Bore
Finished bore of your engine
Stroke
Stroke of your engines crankshaft
Rod Length
Ctr. to Ctr. length of your connecting rods
Gasket Bore
Head Gasket bore diameter
Comp. Gasket
Compressed Head Gasket thickness
Block Deck Height
Center of main bearing bore to top of block
Top Ring Down
Top of 1st ring to top of pistons(FLAT)
Chamber Volume
Cylinder Head chamber volume in CC’s
Dome/Dish Volume
DOME (-) or DISH (+) vol. (theoretical) in CC’s
Piston to Deck
Top of BLOCK to top of piston (FLAT) @ TDC
Click “Calculate” for dimension results.
Total Volume
 
Cylinder Volume
Total cylinder volume in CC’s =
Clearance Volume
All effective vol. above block deck @ TDC in CC’s =
Gasket Volume
Volume of your head gasket in CC’s =
Top Ring Volume
Total volume above the top ring @ TDC in CC’s =
Deck Volume
Volume of area above the pistons @ TDC in CC’s =
Piston Top Land
Piston top land diameter for volume calculations =
1/2 Stroke
1/2 stroke of your engine’s crankshaft in inches =
Compression Ht.
Ctr. of piston pin to top of piston (FLAT) in inches =
Cubic Inches
Cubic inch displacement of your engine =
For the given dimensions, your compression ratio