Keith Black Pistons Dome Top Pistons KB266.STD for Big Twin 1984-1999
$597.31
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Keith Black Pistons Dome Top Pistons KB266.STD for Big Twin 1984-1999
$597.31
Upgrade your air-cooled engine with precision-engineered Keith Black Pistons dome top pistons designed specifically for Big Twin Evolution engines. Crafted from a high-grade hypereutectic 16% silicon alloy, these pistons provide a low thermal expansion rate for significantly tighter piston-to-cylinder operating clearances.
Engineered to deliver an optimized 10.5:1 compression ratio with 80cc combustion chambers, this standard bore set provides exceptional durability and enhanced performance. Each complete set comes supplied with pistons, rings, wrist pins, and clips for a thorough top-end rebuild.
Key Features
| Brand | Keith Black Pistons |
| Part Number | KB266.STD |
| Product Type | Dome Top Pistons |
| Piston Material | Hypereutectic 16% Silicon Alloy |
| Piston Size | Standard (STD) |
| Bore Size | 88.8 mm |
| Stroke | 108 mm |
| Compression Ratio | 10.5:1 (with 80cc head chamber volume) |
| Engine Compatibility | Big Twin Evolution (1984-1999) |
| Engine Type | Air-cooled |
| Weight | 1.8 kg |
Highlights
- 10.5:1 compression ratio with 80cc head chamber volume
- Engineered from cast 16% silicon hypereutectic alloy
- Low thermal expansion allows for tighter piston-to-cylinder clearance
- Specifically designed for air-cooled Big Twin Evo engines
Compatibility
Fits Harley-Davidson Big Twin models from 1984 to 1999 equipped with the Evolution (Evo) engine.
What's included
- 2 x Keith Black Hypereutectic Dome Top Pistons
- 1 x Piston Ring Set
- 2 x Wrist Pins
- 4 x Pin Clips
Downloads
Frequently asked questions
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