Wiseco Black Edition Piston Kit TC 103 CID 9:1 +.010 Oversize - Harley Twin Cam
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Specifications
| BRAND | Wiseco |
| TYPE | Black |
| SKU | K2789 |
| PART NUMBER | K2789 |
| COMPRESSION RATIO | 9:1 |
| BORE | +.010 oversize |
| DISPLACEMENT | 103 CID |
| COATINGS | Armor X and ArmorGlide |
| WEIGHT | 2.4 lb |
| 9 | 1 Compression |
Fitment
Fits these motorcycles
Listed per manufacturer fitment data. Not sure? Email us and we confirm before you order.
The Wiseco Black Edition piston kit is a 103 CID piston set with a 9:1 compression ratio and a +.010 oversize bore. It is built for riders who need to clean up a worn cylinder bore or make a slight displacement increase during a rebuild.
The kit uses a premium ring package, including a Napier second ring with taper face and underhook for improved oil control and a 3mm oil ring with higher tension for effective oil management. A premium compression ring is included to help maintain an optimal seal for consistent power. Armor X coating on the piston reduces wear and extends component life, while ArmorGlide on the skirt minimizes friction and improves scuff resistance.
The +.010 oversize design requires the cylinders to be machined to size, which makes this kit a foundation for a routine refresh or a mild performance build. The combination of advanced coatings and ring technology is intended to deliver a durable and efficient engine that keeps the reliability riders expect from Wiseco.
For off-road / closed-course race use only.
Specifications
- Brand: Wiseco
- Part Number: K2789
- Compression Ratio: 9:1
- Bore: +.010 oversize
- Displacement: 103 CID
- Coatings: Armor X and ArmorGlide
- Weight: 2.4 lbs
Common questions
What compression ratio do these pistons have?
The Wiseco Black Edition pistons have a 9:1 compression ratio.
What bore size is this kit?
This kit is a +.010 oversize piston set, designed for cylinders that need machining to clean up the bore.
What coatings are used on the pistons?
The pistons feature Armor X coating on the piston for reduced wear and ArmorGlide coating on the skirt to reduce friction and improve scuff resistance.
