Keith Black Pistons Dome Top Pistons KB920C.010 for Big Twin 1984-1999
$727.16
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Keith Black Pistons Dome Top Pistons KB920C.010 for Big Twin 1984-1999
$727.16
Engineered for high-performance durability, these Keith Black dome top pistons are precision-crafted from forged 4032 alloy with 11% silicon content. This robust construction delivers superior resistance to cracking in demanding, high-compression applications.
Designed specifically for 1984–1999 Big Twin models, the kit delivers a 9.5:1 compression ratio when paired with standard 85cc combustion chambers. Each complete set includes two fully machined pistons, rings, wrist pins, and clips for a comprehensive engine rebuild.
Key Features
| Brand | Keith Black Pistons |
| Model Number | KB920C.010 |
| Piston Style | Dome Top |
| Oversize | +0.010 in. |
| Bore Size | 89.1 mm |
| Stroke | 108 mm |
| Material | Forged 4032 Aluminum Alloy (11% Silicon) |
| Compression Ratio | 9.5:1 (with 85cc Chamber) |
| Piston to Wall Clearance | +0.001 in. wider clearance required |
| Product Weight | 1.5 kg |
Highlights
- Forged from high-strength 4032 alloy with 11% silicon
- Exceptional resistance to stress and cracking in high-compression builds
- Configured for a 9.5:1 compression ratio with 85cc heads
- Complete set including pistons, rings, pins, and clips
Compatibility
Compatible with Harley-Davidson Big Twin Evolution engine models from 1984 to 1999 with an 89.1 mm bore and 108 mm stroke.
What's included
- 2 x Keith Black Forged Pistons
- 1 x Piston Ring Set
- 2 x Wrist Pins
- 4 x Retaining Clips
Downloads
Frequently asked questions
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