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JE Ultra Series Harley Milwaukee-Eight Piston Kit, 2618, Dish, 4.250 in. Bore, 1.080 CD, -4.30 CC, 11.25-1

Your Price: $695.99

SKU: 391731

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JE Ultra Series Harley Milwaukee-Eight Piston Set, 2618, Dish, 4.250 in. Bore, 4.500 in. Stroke, 1.080 CD, -4.30 CC, 11.25-1, Set of 2

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.

  • Ultra Series Forging
  • Ceramic Crown Coating
  • Skirt Coating
  • Lateral Gas Ports

GTIN: 00193564557124

Piston Series

Cylinder Head

Bore Diameter

Piston Head Type

Compression Height

Piston Volume

Piston Material

Piston Quantity

Forging Type

Piston Average Weight

Ring Set Included

Ring Set Part Number

Ring Quantity

File Fit

Top Ring Radial Width

Top Compression Ring Thickness

Top Ring Facing Material

Top Ring Material

Top Ring Shape

Second Ring Axial Height

Second Ring Radial Width

Second Compression Ring Thickness

Second Ring Facing Material

Second Ring Material

Second Ring Shape

Oil Ring Axial Height

Oil Ring Radial Width

Oil Ring Thickness

Third Ring Facing Material

Years

2024
2023
2022
2021
2020
2019
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Makes

Harley-Davidson

Models

FLHTCUTGSE CVO Tri Glide
FLHTKSE CVO Limited
FLHX Street Glide
FLHXSE CVO Street Glide
FLHXST Street Glide ST
FLTRKSE CVO Road Glide Limited
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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