Keith Black Pistons Dome Top Pistons KB297.040 for Big Twin 1978-1984
$597.31
Skip to product information
Keith Black Pistons Dome Top Pistons KB297.040 for Big Twin 1978-1984
$597.31
Engineered for vintage Harley-Davidson powerplants, these Keith Black Dome Top Pistons deliver dependable performance for 1340cc Shovelhead engines. Constructed from a premium hypereutectic alloy with 16% silicon content, they provide a low thermal expansion rate that allows for tighter piston-to-cylinder operating clearances.
Designed specifically for air-cooled applications, this complete piston set delivers an 8.3:1 compression ratio with 117cc combustion chambers. The precision-crafted kit includes two pistons complete with matched rings, wrist pins, and clips for a comprehensive engine rebuild.
Key Features
| Brand | Keith Black Pistons |
| Part Number | KB297.040 |
| Product Type | Dome Top Pistons |
| Bore Size | 89.9 mm |
| Stroke | 108 mm |
| Oversize | +0.040 in |
| Compression Ratio | 8.3:1 (with 117cc Head Chamber Volume) |
| Material | Hypereutectic Alloy (16% Silicon) |
| Kit Contents | 2 Pistons, Rings, Wrist Pins, and Clips |
| Fitment | Harley-Davidson Big Twin 1978-1984 with 1340cc Shovel Engine |
| Product Weight | 1.8 kg |
Highlights
- 89.9 mm (+.040 in.) bore and 108 mm stroke configuration
- Cast hypereutectic 16% silicon alloy ensures high stability and low thermal expansion
- Allows tighter piston-to-cylinder clearances in air-cooled applications
- Achieves an 8.3:1 compression ratio with standard 117cc chamber volume
Compatibility
Compatible with Harley-Davidson Big Twin models from 1978 through 1984 equipped with a 1340cc Shovelhead engine.
What's included
- 2 x Keith Black Hypereutectic Pistons
- 1 x Set of Piston Rings
- 2 x Wrist Pins
- 4 x Retaining Clips
Downloads
Frequently asked questions
|