Drag Specialties DS-750743 +0.030" Piston Kit – Harley-Davidson Evolution 1340 (1984–2000)
Overbore Top-End Rebuild | OEM Fit | Cast Aluminum Pistons with Pins & Clips

Description:

Give your Harley Evolution engine a new lease on life with the Drag Specialties DS-750743 piston kit, precision-engineered for +0.030" overbore cylinders. Designed to factory specs and built from high-quality cast aluminum, this kit delivers reliable performance and solid compression for years to come.

Perfect for Evo-powered Softail, Dyna, FXR, and Touring models, this kit includes two pistons, wrist pins, and clips—rings sold separately.

Kit Features:

• Cast aluminum pistons built to OEM quality standards

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

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

• Compatible with OEM or Hastings rings (sold separately)

• Ideal for worn cylinder recovery or performance overbore builds

Technical Specs:

• Bore Size: 3.528"

• Oversize: +0.030"

• Compression Ratio: 8.5:1

• Stroke Length: 4-1/4"

• Piston Material: Cast Aluminum

• Units: Kit (2 pistons)

• Weight: 2.69 lbs

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

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

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

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

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

• Special Editions: FXR 2, FXR 3, FXR 4, Disc Glide FXRDG

Covers nearly all 1340cc Evolution-equipped models from 1984 through 2000.