KPMI Beehive Spring Kit 20-21500 for Harley-Davidson Evo & Sportster 1984-2003
$279.00
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KPMI Beehive Spring Kit 20-21500 for Harley-Davidson Evo & Sportster 1984-2003
$279.00
Engineered for high-performance Harley-Davidson applications, the KPMI Beehive Spring Kit utilizes advanced ovate wire chemistry and precision manufacturing to deliver superior valve train stability. Progressively wound from heat-treated and shot-peened Kobe Super-Clean chrome silicon wire, these springs effectively manage high torsional stresses across extreme operating parameters.
Each kit includes FEA-designed, hardened steel retainers and base washers built to strict tolerances. These components ensure precise assembly height, resist keeper pull-through, properly locate the spring, and minimize lateral movement for dependable high-lift performance up to 16.8 mm.
Key Features
| Brand | KPMI |
| Product Type | Beehive Valve Spring Kit |
| Type | Intake / Exhaust |
| Retainer Material | Hardened Steel |
| Spring Material | Chrome Silicon Steel |
| Valve Lift | 16.8 mm |
| Installed Height | 47.2 mm |
| Seat Pressure | 178# |
| Open Pressure | 371# |
| @ Lift | 16.8 mm |
| Product Weight | 0.6 kg |
Highlights
- Engineered from heat-treated and shot-peened Kobe Super-Clean chrome silicon wire
- Supports valve lift up to 16.8 mm
- Includes hardened steel retainers to resist keeper pull-through
- Hardened steel base washers properly locate the spring and restrict lateral movement
- Optimized through finite element analysis (FEA) to withstand high torsional stress
Compatibility
- Harley-Davidson Evolution (1984–1999)
- Harley-Davidson XL 1100cc (1986–1987)
- Harley-Davidson Sportster 883cc / 1200cc (1988–2003)
- Harley-Davidson Twin Cam 88" (1999–2004)
What's included
- KPMI Ovate Wire Beehive Valve Springs
- Hardened Steel Retainers
- Hardened Steel Base Washers
Downloads
Frequently asked questions
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