Drag Specialties DS-750742 +0.020" Piston Kit – Harley-Davidson Evolution 1340 (1984–2000)
OEM-Fit | Overbore Rebuild Kit | Cast Aluminum Pistons with Pins & Clips

Description:

Breathe new life into your Harley-Davidson Evolution engine with the Drag Specialties DS-750742 piston kit, precision-engineered for +0.020" overbore applications. Built from high-quality cast aluminum alloy and matched to OEM specifications, this kit is ideal for restoring compression, power, and performance in your classic Harley.

Designed for 1340cc Evolution engines across FXR, Softail, Dyna, and Touring platforms, this kit includes two pistons, wrist pins, and clips. Rings sold separately.

Kit Features:

• Cast aluminum pistons built to OEM standards

• Some fitments feature friction-reducing coatings for extended service life

• Includes: 2 pistons, 2 wrist pins, 4 circlips

• Compatible with OEM or Hastings rings (sold separately)

• Perfect for overbore rebuilds and worn cylinder recovery

Technical Specs:

• Bore Size: 3.518"

• Bore Oversize: +0.020"

• Compression Ratio: 8.5:1

• Stroke Length: 4-1/4"

• Piston Material: Cast Aluminum

• Units: Kit (for both cylinders)

• Weight: 2.63 lbs

Fitment – Harley-Davidson Evolution 1340 (1984–2000):

• Softail: FLST, FLSTC, FLSTF, FLSTN, FLSTS, FXST, FXSTB, FXSTC, FXSTS

• FXR Series: FXR, FXRS, FXRC, FXRD, FXRS-CONV, FXRS-SP, FXRT, FXR 2, FXR 3, FXR 4

• Dyna: FXD, FXDL, FXDWG, FXDS-CONV, FXDB, FXDC

• Touring: FLHT, FLHTC, FLHTCU, FLHS, FLHR, FLTR, FLTC, FLTCU

Covers nearly all 1340cc Evolution models produced between 1984 and 2000.