HSR SMOOTHBORE CARBURETOR KIT FOR BIG TWIN

$843.75
In Stock — Ready to Ship
Ships in 48hrs
30-Day Returns
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Weight: 8.10

When it comes to fuel induction systems, Mikuni has taken the scientific approach towards making more power.

Some aftermarket carburetors use butterfly throttle valves, which obstruct the carburetor’s venturi at all throttle openings, creating airflow turbulence and hindering precise air/fuel metering.

The Mikuni HSR with its flat throttle slide allows for an unobstructed venturi that actually flows more air at full throttle, to produce more peak power than other carburetors with bigger bores.

While at smaller throttle openings, the Mikuni’s smaller yet higher velocity flowing venturi, together with its advanced fuel metering system, provides a stronger overall powerband.

Features greater (15%) air flow, enlarged needle and float bowl, adjustable accelerator pump and enrichner system.

All kits are jetted perfectly and ready to run. Included is complete installation instructions and owner’s manual. Will fit cruise control model bikes if cruise control is not used.

  • 45 m Performance Carburetor Kit for Twin Cam.
  • Fits Twin Cam 1999/2006 (use 1999/2006 cables).
  • Kit includes standard length manifold, manifold to carburetor adapter, K&N® air filter, chrome filter cover, mounting hardware and instructions.

MIKUNI®

Not legal for sale or use in California, or on any pollution controlled vehicles.

Specifications coming soon.

Shipping Information

In-stock orders ship within 1–2 business days. Shipping time varies by location and carrier. Standard domestic shipping is available for most items. Expedited options may be available at checkout.

  • Free Standard Shipping on orders over $99
  • Most orders ship within 48 business hours
  • Tracking number provided upon shipment
  • Oversized items may require freight shipping

Return Policy

We accept returns on eligible new items within 30 days of delivery. Used parts are sold as-is and may not be eligible for return. Items must be in original, uninstalled condition with all original packaging.

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Fitment information is listed in the product details above. If you have questions about compatibility for your specific model and year, please contact our team before ordering.
New parts carry the manufacturer warranty where applicable. Used parts are sold as-is and are typically tested or described in detail. See the product condition notes for specifics.
Once your order ships, you will receive an email with a tracking number. You can also log into your account at any time to view order status.
Used parts are generally sold as-is and are not eligible for return unless there was a significant misdescription. Contact us within 7 days of delivery if you have a concern.

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