Mikuni HSR 45/42 Total Carburetor Kit - 45mm KIT TC W/Mfld — Harley-Davidson Road King, Road King Classic, Electra Glide (1999-2006)

Mikuni HSR 45/42 Total Carburetor Kit with 45mm carb, manifold, and high-flow air filter for Big Twin EVO and Twin Cam models. Supports up to 100 horsepower with minimal filter restriction and comes complete except for manifold clamps and seals.

Features

• 45mm HSR carburetor
• Special intake manifold included
• High-flow air filter rated to 100 hp
• Rubber intake flange
• Breather kit included for 1993-1999 models

Specifications

• Brand: Mikuni
• Manufacturer Part #: F45-4
• Carburetor Size: 45mm
• Length: 8.7 in
• Width: 16.1 in
• Height: 5.9 in
• Weight: 8.33 lbs
• Country of Origin: Japan

Fitment

Fits Big Twin EVO and Twin Cam models. Includes breather kit for 1993-1999 models. 1984-1989 models require cables from 1990-1995 models to complete installation.

Frequently Asked Questions

What's included in this Total Kit?

45mm HSR carburetor, intake manifold, rubber flange, high-flow air filter, and breather kit (1993-1999 models). Manifold clamps and seals sold separately.

Will this fit my 1984-1989 Big Twin?

Yes, but you must source intake cables from 1990-1995 model years — they are not included in this kit.

What horsepower does the air filter support?

The high-flow filter is rated for up to 100 horsepower with no loss from filter restriction.

Do I need to rejet or tune after installation?

Jetting and fuel tuning are typically required when switching to a larger carburetor — have a qualified carb tuner dial it in for your engine.