Wiseco Nylon Flexhone Brush - 76-89mm

Wiseco Nylon Flexhone Brush for 76–89mm bores, designed to finish honing surfaces in V-twin engine blocks. The abrasive-impregnated nylon bristles remove microscopic peaks and scuffs without enlarging the bore, leaving a superior plateau finish suitable for ring seating.

Features

• Abrasive-impregnated nylon bristles
• Removes peaks and scuffs without bore enlargement
• Creates superior plateau finish for ring seating
• Safe for plated and cast-iron bores
• Works on 2-cycle and 4-cycle engines
• 76–89mm bore range

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

Fitment

Fits V-twin motorcycle engine blocks in the 76–89mm bore size range, including Harley-Davidson and Indian Motorcycle engines.

Frequently Asked Questions

What does a flexhone brush do differently than regular honing?

The abrasive nylon bristles burnish the bore surface to remove microscopic peaks left after initial honing, creating a plateau finish that helps rings seat faster and seal better.

Will this enlarge my bore?

No — the flexhone is designed to smooth and finish without increasing bore diameter, making it ideal for final-step engine reconditioning.

Can I use this on both cast-iron and plated bores?

Yes. It is safe for use on plated bores, cast-iron bores, and both 2-cycle and 4-cycle engines.

What bore sizes does this cover?

This brush is sized for 76–89mm bores. Wiseco makes flexhone brushes in other bore ranges — verify your engine's bore size before ordering.

Is this tool recommended for performance builds?

Yes — high-performance engine builders use it as a final finishing step to optimize ring seating and cylinder wall break-in.