Mikuni HSR 45/42 Total Carburetor Kit - 45mm KIT EVO W/Mfld — Harley-Davidson (1984-1999)

Mikuni HSR 45/42 Total Carburetor Kit delivers a complete bolt-on carb setup for Big Twin EVO and Twin Cam engines, including a custom intake manifold, high-flow air filter rated to 100 hp, and breather kit. Drop-in solution for riders upgrading from stock fuel delivery without piecemealing components.

Features

• Custom intake manifold for HSR 45 or 42mm carb
• High-flow air filter supports 100 hp with zero restriction loss
• Breather kit included for 1993-1999 models
• All mounting hardware except manifold clamps and seals

Specifications

• Brand: Mikuni
• Manufacturer Part #: F45-2
• Length: 8.7 in
• Width: 16 in
• Height: 5.8 in
• Weight: 8.89 lbs
• Country of Origin: Japan

Fitment

Fits Big Twin EVO (1984-1999) and Twin Cam (1999-2006) models. 1993-1999 EVO models include a breather kit; 1984-1989 models require cables from 1990-1995 models.

Frequently Asked Questions

What's included in this kit?

Intake manifold, rubber flange, high-flow air filter, and breather kit (for select years). Manifold clamps and seals sold separately.

Will this fit my 1984-1989 EVO?

Yes, but you'll need to source intake cables from 1990-1995 model-year components. The kit does not include those cables.

Does this require jetting or tuning?

Carburetors require proper jetting for your altitude and setup. Manifold and filter alone do not guarantee correct fuel mapping — work with a shop or fuel specialist.

Can I use an HSR 42 instead of the HSR 45 with this manifold?

Yes — this manifold accepts either HSR 42 or 45mm carburetor bodies.