Mikuni Rubber Flange Adapter — Harley-Davidson Electra Glide Classic, Softail Custom, Softail Heritage Classic (1984-1999)

Mikuni rubber flange adapter for V-twin motorcycle carburetors, engineered to seal the intake manifold connection. Direct OEM Mikuni part manufactured in Japan and distributed by Western Power Sports.

Features

• Genuine Mikuni OEM part
• Rubber construction for vibration damping
• Fits standard V-twin intake flanges

Specifications

• Brand: Mikuni
• Manufacturer Part #: FHS42/018-45K
• Length: 3.9 in
• Width: 3.25 in
• Height: 1.15 in
• Weight: 0.24 lbs
• Country of Origin: Japan

Fitment

Fits V-twin motorcycles with Mikuni carburetor intake manifolds.

Frequently Asked Questions

What is this adapter used for?

It seals the connection between a Mikuni carburetor and the V-twin engine intake manifold, preventing vacuum leaks.

Is this a genuine Mikuni part?

Yes — this is an OEM Mikuni part number FHS42/018-45K manufactured in Japan.

Does rubber degrade over time?

Rubber adapters can harden and crack after 10+ years. Replacement is recommended if you notice vacuum leaks or rough idle.

Will this fit my Harley or Indian with aftermarket carbs?

This adapter is designed for Mikuni carburetors on V-twin engines. Verify your carburetor brand and intake flange size before ordering.