Wiseco Nylon Flexhone Brush - 76-89mm Bore V-Twin
About Wiseco
Wiseco has forged pistons in Mentor, Ohio since 1941, supplying everything from factory race teams to big-bore street builds. Forged construction is what lets a V-twin survive higher compression and more cylinder pressure than the stock cast piston was designed for.
The Wiseco Nylon Flexhone Brush is engineered to provide a critical finishing touch to your V-twin engine's cylinder bores. This specialized brush removes microscopic imperfections, preparing the bore for optimal ring seating and performance. It's an essential tool for any engine builder focused on precision.
Why riders pick this
- Refines cylinder bore surfaces for optimal ring seating
- Abrasive-impregnated nylon bristles remove imperfections
- Designed for 76-89mm V-twin engine bores
- Safe for both plated and cast-iron cylinders
- Does not enlarge the bore, only refines the finish
After initial honing, the Wiseco Nylon Flexhone Brush goes to work, burnishing the cylinder walls to create a superior plateau finish. This process is crucial for effective ring seating, which directly impacts compression and overall engine longevity. It's designed to refine the bore surface without over-enlarging it, making it safe for both plated and cast-iron cylinders.
Precision Surface Refinement
- Abrasive-impregnated nylon bristles for controlled material removal
- Removes microscopic peaks and scuffs without bore enlargement
- Creates an ideal plateau finish for rapid ring seating
- Safe for use on both plated and cast-iron cylinder bores
Engine Building Essentials
Achieving proper ring seal is paramount for any high-performance V-twin build. This flexhone brush is an invaluable part of that process, ensuring your fresh rings have the best possible surface to seat against. Pair it with quality lubricants and follow manufacturer guidelines for best results in your Harley-Davidson or Indian Motorcycle engine.
Specifications
- Brand: Wiseco
- Manufacturer Part #: W6078
- Bore Size: 76–89mm
- Length: 6.6 in
- Width: 13 in
- Height: 4.45 in
- Weight: 0.47 lbs
Common questions
What is the primary benefit of using a flexhone brush?
The flexhone brush creates a plateau finish on the cylinder walls, which is critical for allowing new piston rings to seat properly and quickly, leading to better compression and engine performance.
Will this tool enlarge my cylinder bore?
No, this flexhone brush is specifically designed to refine the surface finish of the bore without actually enlarging its diameter. It removes microscopic peaks left by initial honing.
Is this suitable for all V-twin engine types?
This brush is designed for V-twin engine blocks with bore sizes between 76mm and 89mm, and is safe for both plated and cast-iron bores found in Harley-Davidson and Indian Motorcycle engines.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Wiseco |
| TYPE | Tools |
| SKU | 39-6078 |
| WEIGHT | 0.47 lb |
