Description
Features
- Manufactured from high-strength, T-5, heat-treated, 390 hypereutectic aluminum alloy
- Allow a tighter fit and longer piston and ring life
- Diamond-machined pistons are held to plus or minus one gram weight and less than one-half-thousandth-inch (.0005″) tolerances from piston to piston
- Each kit contains two pistons, pins, spiral-lock pin clips and Hastings moly rings
- Replacement piston rings and pin lock rings available separately
- KB pistons can be installed tighter than other pistons. This results in less piston rock and better ring seal. Please read instructions included with piston for correct piston clearance.
- Due to the thermal conductivity and design of KB pistons, special attention is required to the top ring end gap. Please read instructions furnished with piston for correct ring installation.
Specs
| Bore Oversize | +0.010″ |
| Product Name | Piston Kit |
| Riding Style | Street |
| Piston Material | Hypereutectic Alloy |
| Bore Size | 3.498″ |
| Compression Ratio | 9.6:1 |
| Units | Kit |
| 1987-1994 | Harley-Davidson | Low Rider Custom FXLR |
| 1984-1993 | Harley-Davidson | Sport Glide FXRT |
| 1988-1999 | Harley-Davidson | Softail Springer FXSTS |
| 1986-1999 | Harley-Davidson | Softail Custom FXSTC |
| 1987-1999 | Harley-Davidson | Softail Heritage Classic FLSTC |
| 1990-1999 | Harley-Davidson | Softail Fat Boy FLSTF |
| 1994-1996 | Harley-Davidson | Softail Heritage Special FLSTN |
| 1999 | Harley-Davidson | FXR 2 |
| 1984-1994 | Harley-Davidson | Tour Glide Classic FLTC |
| 1995-1997 | Harley-Davidson | Softail Bad Boy FXSTSB |
| 1984-1993 | Harley-Davidson | Softail Standard FXST |
| 1989-1998 | Harley-Davidson | Electra Glide Ultra Classic FLHTCU |
| 1985-1987, 1995-1998 | Harley-Davidson | Electra Glide Standard FLHT |
| 1984-1985 | Harley-Davidson | Low Glide FXRS |
| 1984-1998 | Harley-Davidson | Electra Glide Classic FLHTC |
| 1990-1993 | Harley-Davidson | Low Rider Convertible FXRS-CONV |
| 1993-1998 | Harley-Davidson | Wide Glide FXDWG |
| 1986-1993 | Harley-Davidson | Low Rider FXRS |
| 1986-1990 | Harley-Davidson | Softail Heritage FLST |
| 1995-1998 | Harley-Davidson | Electra Glide Ultra Classic EFI FLHTCUI |
| 1999 | Harley-Davidson | Softail Night Train FXSTB |
| 1998 | Harley-Davidson | Road King Classic EFI FLHRC |
| 1996 | Harley-Davidson | Tour Glide Ultra Classic EFI FLTCU |
| 1989-1996 | Harley-Davidson | Tour Glide Ultra Classic FLTCU |
| 1987-1993 | Harley-Davidson | Electra Glide Sport FLHS |
| 1988-1993 | Harley-Davidson | Low Rider Sport FXRS-SP |
| 1995-1998 | Harley-Davidson | Super Glide FXD |
| 1996-1998 | Harley-Davidson | Road King EFI FLHR |
| 1994-1998 | Harley-Davidson | Road King FLHR |
| 1993-1998 | Harley-Davidson | Low Rider FXDL |
| 1985-1986 | Harley-Davidson | Wide Glide FXWG |
| 1995-1998 | Harley-Davidson | Electra Glide Classic EFI FLHTCI |
| 1995-1998 | Harley-Davidson | Dyna Convertible FXDS-CONV |
| 2000 | Harley-Davidson | FXR 4 |
| 1985 | Harley-Davidson | Fat Bob FXEF |
| 1985 | Harley-Davidson | Low Glide Custom FXRC |
| 1986-1994 | Harley-Davidson | Super Glide FXR |
| 1992 | Harley-Davidson | Dyna Glide Custom FXDC |
| 1992 | Harley-Davidson | Dyna Daytona FXDB |
| 1998 | Harley-Davidson | Road Glide FLTR |
| 1984 | Harley-Davidson | Disc Glide FXRDG |
| 1985 | Harley-Davidson | Low Rider FXSB |
| 1997-1999 | Harley-Davidson | Softail Heritage Springer FLSTS |
| 1993 | Harley-Davidson | Softail Nostalgia FLSTN |
| 1986 | Harley-Davidson | Sport Glide Grand Touring FXRD |
| 1987 | Harley-Davidson | Low Rider Chrome FXRC |
| 1999 | Harley-Davidson | FXR 3 |
| 1998 | Harley-Davidson | Road Glide EFI FLTR |
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information and the manufacturer’s information. Consult manufacturer publication(s) and/or website(s) for specific fitment and application information and other important information. This fitment information is based upon the stock version of the motorcycle or unit referenced and any accessory added or other modification could invalidate the quick reference information provided.
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