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	<title>Mikuni &#8211; AmericanV-twin.com</title>
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	<item>
		<title>Mikuni HSR45 Total Carburetor Kit For Harley Big Twin Evo 1984-1999</title>
		<link>https://www.american-twin.com/product/mikuni-hsr45-total-carburetor-kit-for-harley-big-twin-evo-1984-1999/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Sat, 03 Jan 2026 04:28:05 +0000</pubDate>
				<guid isPermaLink="false">https://www.american-twin.com/?post_type=product&#038;p=8090</guid>

					<description><![CDATA[Item: P7576 SKU: 22289 

<p>Dominate the road with the <strong>Mikuni HSR45 Total Carburetor Kit</strong>, the ultimate fuel delivery upgrade for high-performance <strong>1984&#8211;1999 Harley-Davidson Big Twin Evolution</strong> models.</p>]]></description>
										<content:encoded><![CDATA[<h2>Mikuni HSR45 Total Carburetor Kit For Harley Big Twin Evo 1984-1999</h2>
<p>Dominate the road with the <strong>Mikuni HSR45 Total Carburetor Kit</strong>, the ultimate fuel delivery upgrade for high-performance <strong>1984–1999 Harley-Davidson Big Twin Evolution</strong> models. Featuring a massive <strong>45mm smoothbore</strong> venturi, this &#8220;Total Kit&#8221; is engineered specifically for large-displacement or highly modified Evo engines. Unlike the &#8220;Easy Kit,&#8221; the <strong>45-4 Total Kit</strong> includes a high-flow intake manifold and a dedicated air cleaner adapter to ensure maximum CFM. Experience unmatched throttle response, roller-bearing precision, and significant horsepower gains for your built Big Twin.</p>
<h3>Mikuni HSR45 Total Carburetor Kit For Harley Big Twin Evo</h3>
<h3>Features</h3>
<ul>
<li>Improves starting, ridability, power ADN torque</li>
<li>Features a two piece throttle slide that rolls on stainless roller bearings, a lighter throttle return spring, a low speed air screw and an enlarged needle valve and float bowl</li>
<li>Kits include HSR45 carburetor, performance intake manifold, free flowing K&amp;N air filter assembly, chrome air cleaner cover, adaptors and detailed installation and tuning manual</li>
<li>Fits all carbureted Evo Big Twin models</li>
<li>Will not permit the use of cruise control</li>
</ul>
<p>&nbsp;</p>
<table class="sku-data ">
<thead class="sku-data__head-wrapper">
<tr class="sku-data__head-row">
<th class="sku-data__head-item" scope="col">Product Style</th>
<th class="sku-data__head-item" scope="col">AmericanV-twin Item #</th>
<th class="sku-data__head-item" scope="col">Catalog Number</th>
<th class="sku-data__head-item" scope="col">Store Sku</th>
<th class="sku-data__head-item" scope="col">MFR. Product #</th>
<th class="sku-data__head-item" scope="col">Availability</th>
</tr>
</thead>
<tbody class="sku-data__body-wrapper">
<tr class="sku-data__body-row">
<td class="sku-data__body-item">Mikuni HSR45 Total Carburetor Kit For Harley Big Twin Evo 1984-1999</td>
<td class="sku-data__body-item">22289</td>
<td class="sku-data__body-item">400-678</td>
<td class="sku-data__body-item"></td>
<td class="sku-data__body-item">45-2</td>
<td class="sku-data__body-item">In Stock: Ships within 24 hours</td>
</tr>
</tbody>
</table>
<p><strong>This Product Fits</strong></p>
<p>Harley Davidson<br />
    Disc Glide FXRDG 1984<br />
    Dyna Convertible FXDS 1994, 1995, 1996, 1997, 1998<br />
    Dyna Glide Custom FXDC 1992<br />
    Dyna Glide Daytona FXDB-D 1992<br />
    Dyna Glide Sturgis FXDB-S 1991<br />
    Dyna Low Rider FXDL/I 1993-1998<br />
    Dyna Super Glide FXD/I 1995, 1996, 1997, 1998<br />
    Dyna Wide Glide FXDWG/I 1993-1998<br />
    Electra Glide Classic FLHTC/I 1984-1998<br />
    Electra Glide Special FLHX 1984<br />
    Electra Glide Sport FLHS 1984-1993<br />
    Electra Glide Standard FLHT/I 1984-1998<br />
    Electra Glide Ultra Classic FLHTCU/I 1989-1998<br />
    Fat Bob FXEF 1985<br />
    FLH 1984, 1985<br />
    FXR2 CVO/SE 1999<br />
    FXR3 CVO/SE 1999<br />
    FXR4 CVO/SE 2000<br />
    Low Glide/Low Rider FXRS 1984-1993<br />
    Low Rider Chrome FXRC 1985, 1986, 1987, 1988<br />
    Low Rider Custom FXLR 1987-1994<br />
    Low Rider Sport FXRS-SP 1987-1993<br />
    Road Glide FLTR/I 1998<br />
    Road King Classic FLHRC/I 1998<br />
    Road King FLHR/I 1994, 1995, 1996, 1997, 1998<br />
    Softail Bad Boy Springer FXSTSB 1995, 1996, 1997<br />
    Softail Custom FXSTC/I 1986-1998<br />
    Softail Fat Boy FLSTF/I 1990-1999<br />
    Softail Heritage Classic FLSTC/I 1987-1999<br />
    Softail Heritage FLST/I 1986, 1987, 1988, 1989, 1990<br />
    Softail Heritage Springer FLSTS/I 1997, 1998, 1999<br />
    Softail Nostalgia FLSTN/I 1993<br />
    Softail Special FLSTN/I 1994, 1995, 1996<br />
    Softail Springer FXSTS/I 1988-1999<br />
    Softail Standard FXST/I 1984-1999<br />
    Sport Glide FXRT 1984-1992<br />
    Sport Glide Grand Touring FXRD 1986<br />
    Super Glide FXE 1984, 1985<br />
    Super Glide FXR 1986-1994<br />
    Tour Glide Classic FLTC/I 1984-1991<br />
    Tour Glide FLT 1984, 1985, 1986<br />
    Tour Glide Ultra Classic FLTCU/I 1989-1996<br />
    Wide Glide FXWG 1984, 1985, 1986 </p>
]]></content:encoded>
					
		
		
			</item>
		<item>
		<title>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin 1990-2006</title>
		<link>https://www.american-twin.com/product/mikuni-hsr42-easy-carburetor-kit-for-harley-big-twin-1990-2006/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Fri, 02 Jan 2026 20:14:53 +0000</pubDate>
				<guid isPermaLink="false">https://www.american-twin.com/?post_type=product&#038;p=8038</guid>

					<description><![CDATA[Item: P7558 
<div class="product-short-description">

Experience the legendary performance of the <strong>Mikuni HSR42 Easy Carburetor Kit</strong>. Specifically engineered for <strong>1990–2006 Harley-Davidson Big Twin</strong> models, this "Easy Kit" provides a massive upgrade in throttle response and power while allowing you to retain your stock intake manifold, throttle cables, and air cleaner cover.
<ul>
 	<li>42mm smoothbore design for maximum airflow velocity.</li>
 	<li>Roller-bearing throttle slide for an incredibly light and crisp feel.</li>
 	<li>"Easy Kit" convenience: Bolt-on design uses factory cables and manifold.</li>
 	<li>Substantial horsepower and torque increases across the powerband.</li>
</ul>
</div>]]></description>
										<content:encoded><![CDATA[<h2>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin 1990-2006</h2>
<div class="product-long-description">
<h4>The Ultimate Smoothbore Power: Mikuni HSR42 Easy Kit for Harley Big Twins</h4>
<p>For riders of 1990–2006 Harley-Davidson Big Twins, the factory constant-velocity (CV) carburetor is often the primary obstacle to true performance. The <strong>Mikuni HSR42 Easy Carburetor Kit</strong> is widely considered the single best performance modification for the <strong>Evolution 1340 and Twin Cam 88</strong> engines. Unlike the vacuum-operated stock units, the HSR42 is a <strong>mechanical smoothbore carburetor</strong>. It features a flat slide that rides on stainless steel roller bearings, providing a straight path for air and fuel to enter the engine. This eliminates the turbulence and lag associated with stock carburetors, resulting in a motorcycle that feels instantly more responsive, more powerful, and significantly more refined.</p>
<h3>The &#8220;Easy Kit&#8221; Advantage: Performance Without the Complexity</h3>
<p>The Mikuni &#8220;Easy Kit&#8221; (Part Number 42-18) was created for the rider who wants racing-level performance without a complicated installation process. What sets this kit apart is its ability to interface perfectly with your original equipment. It is designed to fit onto your <strong>stock Harley-Davidson intake manifold</strong> and utilizes your <strong>original factory throttle cables</strong>. Additionally, the kit includes a specialized adapter that allows you to reuse your stock air cleaner cover, maintaining the classic look of your bike while hiding a high-performance secret underneath. By eliminating the need for new manifolds and custom cables, the HSR42 Easy Kit offers the highest &#8220;horsepower-per-dollar&#8221; value in the V-Twin aftermarket.</p>
<h3>Precision Engineering and Instant Response</h3>
<p>The hallmark of the Mikuni HSR42 is its <strong>roller-bearing throttle slide</strong>. While other performance carburetors can feel heavy or stiff at the grip, the Mikuni slide glides effortlessly, even under high engine vacuum. This provides a precise, &#8220;one-to-one&#8221; connection between your right hand and the rear tire.</p>
<ul>
<li><strong>Adjustable Accelerator Pump:</strong> The HSR42 features a fully tunable accelerator pump, allowing you to dial in the exact amount of fuel needed to eliminate flat spots and off-idle hesitation.</li>
<li><strong>Superior Fuel Atomization:</strong> The advanced needle and jet design ensures that fuel is broken down into a finer mist than stock carburetors, leading to more efficient combustion and smoother power delivery.</li>
<li><strong>Increased Airflow:</strong> The 42mm venturi is perfectly sized for 80&#8243;, 88&#8243;, and 95&#8243; engines, providing a significant boost in mid-range torque and top-end horsepower.</li>
</ul>
<h3>Technical Fitment and Model Coverage</h3>
<p>This kit is specifically tailored for the transition years between the Evolution and Twin Cam eras, covering nearly two decades of Harley-Davidson history.</p>
<ul>
<li><strong>Compatible Models:</strong> Fits 1990–1999 Evolution Big Twins and 1999–2006 Twin Cam models (Carbureted).</li>
<li><strong>Included Hardware:</strong> The kit comes with the HSR 42mm carburetor, air cleaner backing plate adapter, and easy-to-follow instructions.</li>
<li><strong>Tuning Versatility:</strong> Because of its immense popularity, the HSR42 has a massive ecosystem of jets and needles available for riders at high altitudes or those with high-compression engine builds.</li>
<li><strong>Long-Term Reliability:</strong> Built with high-grade components that are resistant to the heat and vibration of air-cooled V-Twin engines.</li>
</ul>
<h3>Why Choose Mikuni for Your Big Twin?</h3>
<p>Choosing the <strong>Mikuni HSR42 Easy Kit</strong> is an investment in the ride quality of your Harley-Davidson. It transforms the &#8220;lazy&#8221; feel of a stock carbureted Big Twin into a crisp, aggressive machine that is a joy to ride in both city traffic and on the open highway. You will experience easier cold starts, a more consistent idle, and a level of acceleration that will make your bike feel years younger. Backed by Mikuni’s decades of racing dominance, the HSR42 is the gold standard of V-Twin fuel delivery. Don&#8217;t settle for &#8220;good enough&#8221; from your factory carb—experience the smoothbore difference today.</p>
<p><em>Note: For 2004–2006 models, check your specific manifold clearance if using an aftermarket air cleaner. Professional tuning is recommended to ensure the air-fuel ratio is optimized for your exhaust system.</em></p>
</div>
<p>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin</p>
<p>The Mikuni HSR42 Easy Carburetor Kit replaces stock CV carb for better performance, more power and dependability. It features a two-piece throttle slide that rolls on stainless bearings for smoother operation, excellent throttle response, and easier starting. The 42mm carburetor smoothbore Venturi creates great airflow, while the enlarged needle and seat provide extended full-throttle operation. The adjustable accelerator pump gives you the best motorcycle performance with instant throttle response at any RPM, and the light throttle return spring makes for easy pull operation. The Easy Carbutaotr Kit works with stock manifold and throttle cables, choke cable, and air cleaner. This kit includes the carb adaptor. High-flow air filter such as 400-639 recommended for maximum performance.<br />
Features</p>
<p>Replaces stock CV carb<br />
Stainless bearings<br />
Pre-jetted 42mm carburetor smoothbore<br />
Enlarged needle and seat<br />
Instant throttle response at any RPM<br />
Easy pull operation<br />
Works with stock manifold and throttle cases<br />
Includes carb adaptor<br />
Use with high-flow air filter</p>
<p>&nbsp;</p>
<table class="sku-data ">
<thead class="sku-data__head-wrapper">
<tr class="sku-data__head-row">
<th class="sku-data__head-item" scope="col">Product Style</th>
<th class="sku-data__head-item" scope="col">AmericanV-twin Item #</th>
<th class="sku-data__head-item" scope="col">Catalog Number</th>
<th class="sku-data__head-item" scope="col">Store Sku</th>
<th class="sku-data__head-item" scope="col">MFR. Product #</th>
<th class="sku-data__head-item" scope="col">Availability</th>
</tr>
</thead>
<tbody class="sku-data__body-wrapper">
<tr class="sku-data__body-row">
<td class="sku-data__body-item">Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin 1990-2006</td>
<td class="sku-data__body-item">22250</td>
<td class="sku-data__body-item">400-584</td>
<td class="sku-data__body-item"></td>
<td class="sku-data__body-item">42-18</td>
<td class="sku-data__body-item">In Stock: Ships within 24 hours</td>
</tr>
</tbody>
</table>
<p><strong>This Product Fits</strong></p>
<p>Harley Davidson<br />
    Dyna Convertible FXDS 1994-2000<br />
    Dyna Glide Custom FXDC 1992<br />
    Dyna Glide Daytona FXDB-D 1992<br />
    Dyna Glide Sturgis FXDB-S 1991<br />
    Dyna Low Rider FXDL/I 1993-2005<br />
    Dyna Super Glide Custom FXDC/I 2005<br />
    Dyna Super Glide FXD/I 1995-2005<br />
    Dyna Super Glide Sport FXDX 1999-2005<br />
    Dyna Super Glide Sport Touring FXDXT 2001, 2002, 2003<br />
    Dyna Wide Glide CVO/SE FXDWG2 2001<br />
    Dyna Wide Glide CVO/SE FXDWG3 2002<br />
    Dyna Wide Glide FXDWG/I 1993-2005<br />
    Electra Glide Classic FLHTC/I 1990-2006<br />
    Electra Glide CVO/SE FLHTCSE 2004<br />
    Electra Glide CVO/SE FLHTCSE2 2005<br />
    Electra Glide Sport FLHS 1990, 1991, 1992, 1993<br />
    Electra Glide Standard FLHT/I 1990-2006<br />
    Electra Glide Ultra Classic FLHTCU/I 1990-2006<br />
    FXR2 CVO/SE 1999<br />
    FXR3 CVO/SE 1999<br />
    FXR4 CVO/SE 2000<br />
    Low Glide/Low Rider FXRS 1990, 1991, 1992, 1993<br />
    Low Rider Custom FXLR 1990, 1991, 1992, 1993, 1994<br />
    Low Rider Sport FXRS-SP 1990, 1991, 1992, 1993<br />
    Road Glide CVO/SE FLTRSEI2 2001<br />
    Road Glide FLTR/I 1998-2006<br />
    Road Glide SE FLTRSEI 2000<br />
    Road King Classic FLHRC/I 1998-2006<br />
    Road King Custom FLHRS/I 2004, 2005, 2006<br />
    Road King CVO/SE FLHRSEI 2002<br />
    Road King CVO/SE FLHRSEI2 2003<br />
    Road King FLHR/I 1994-2006<br />
    Softail Bad Boy Springer FXSTSB 1995, 1996, 1997<br />
    Softail Custom FXSTC/I 1990-1999<br />
    Softail Deluxe FLSTN/I 2005, 2006<br />
    Softail Deuce CVO/SE FXSTDSE 2003<br />
    Softail Deuce CVO/SE FXSTDSE2 2004<br />
    Softail Deuce FXSTD/I 1999-2006<br />
    Softail Fat Boy CVO/SE FLSTFSE 2005<br />
    Softail Fat Boy CVO/SE FLSTFSE2 2006<br />
    Softail Fat Boy FLSTF/I 1990-2006<br />
    Softail Heritage Classic FLSTC/I 1990-2006<br />
    Softail Heritage FLST/I 1990, 2006<br />
    Softail Heritage Springer FLSTS/I 1997-2003<br />
    Softail Night Train FXSTB/I 1999-2006<br />
    Softail Nostalgia FLSTN/I 1993<br />
    Softail Special FLSTN/I 1994, 1995, 1996<br />
    Softail Springer Classic FLSTSC/I 2005, 2006<br />
    Softail Springer FXSTS/I 1990-2006<br />
    Softail Standard FXST/I 1990-2006<br />
    Sport Glide FXRT 1990, 1991, 1992<br />
    Street Glide FLHX/I 2006<br />
    Super Glide FXR 1990, 1991, 1992, 1993, 1994<br />
    Tour Glide Classic FLTC/I 1990, 1991<br />
    Tour Glide Ultra Classic FLTCU/I 1990-1996<br />
    Ultra Classic Electra Glide CVO/SE FLHTCUSE 2006 </p>
]]></content:encoded>
					
		
		
			</item>
		<item>
		<title>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin Evo 1990-1999</title>
		<link>https://www.american-twin.com/product/mikuni-hsr42-easy-carburetor-kit-for-harley-big-twin-evo-1990-1999-2/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Fri, 02 Jan 2026 19:55:51 +0000</pubDate>
				<guid isPermaLink="false">https://www.american-twin.com/?post_type=product&#038;p=8030</guid>

					<description><![CDATA[Item: P97559 SKU: 222251 

<div class="product-short-description">
    <p>Unlock the true potential of your 80" Evolution engine with the <strong>Mikuni HSR42 Easy Carburetor Kit</strong>. Engineered for <strong>1990–1999 Harley Big Twins</strong>, this "Easy Kit" provides a massive boost in throttle response and power while utilizing your stock manifold, cables, and air cleaner.</p>
    <ul>
        <li>42mm smoothbore design for maximum airflow and velocity.</li>
        <li>Roller-bearing throttle slide for effortless, crisp operation.</li>
        <li>"Easy Kit" design: Re-uses factory manifold and throttle cables.</li>
        <li>Significant gains in torque and horsepower across the entire RPM range.</li>
    </ul>
</div>]]></description>
										<content:encoded><![CDATA[<h2>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin Evo 1990-1999</h2>
<div class="product-long-description">
<h4>The Ultimate Smoothbore Performance: Mikuni HSR42 Easy Kit for Harley Evo</h4>
<p>For riders of 1990–1999 Harley-Davidson Big Twin Evolution models, the stock CV carburetor is often the &#8220;bottleneck&#8221; that prevents the 80-cubic-inch engine from truly breathing. The <strong>Mikuni HSR42 Easy Carburetor Kit</strong> is widely regarded as the finest performance upgrade available for the Evo platform. Unlike traditional butterfly-style carburetors, the HSR42 features a <strong>smoothbore design</strong> with a flat slide that moves on roller bearings. This eliminates the turbulence found in stock carburetors, allowing for a straight, high-velocity shot of air and fuel directly into the intake tract. The result is a motorcycle that feels completely transformed, offering instant acceleration and a level of refinement that factory equipment simply cannot match.</p>
<h3>The &#8220;Easy Kit&#8221; Advantage: Performance Without the Hassle</h3>
<p>Mikuni designed the &#8220;Easy Kit&#8221; specifically for the rider who wants maximum performance with a straightforward installation. This kit (often referenced as part number 42-18) is engineered to be a &#8220;bolt-on&#8221; solution for 1990–1999 Big Twins. What makes it &#8220;Easy&#8221; is its clever compatibility: it is designed to fit onto your <strong>original factory intake manifold</strong> and utilizes your <strong>stock Harley-Davidson throttle cables</strong>. Furthermore, the kit is designed to work with your factory air cleaner cover, allowing you to maintain a sleeper look while hiding a high-performance racing carburetor underneath. This eliminates the need to purchase expensive additional manifolds or cable sets, making it one of the most cost-effective horsepower-per-dollar upgrades on the market.</p>
<h3>Precision Engineering and Superior Throttle Response</h3>
<p>The standout feature of the Mikuni HSR42 is the <strong>roller-bearing throttle slide</strong>. While other performance carburetors can feel heavy or &#8220;sticky&#8221; under vacuum, the Mikuni slide glides effortlessly. This gives the rider a light, precise feel at the grip and provides an instantaneous connection between the throttle and the rear wheel.</p>
<ul>
<li><strong>Adjustable Accelerator Pump:</strong> The HSR42 features a fully adjustable accelerator pump that allows you to dial in the perfect &#8220;squirt&#8221; of fuel, eliminating off-idle hesitation and flat spots.</li>
<li><strong>Advanced Fuel Metering:</strong> With a highly sensitive needle and jet system, the Mikuni provides superior atomization, which often leads to improved fuel economy and smoother idling compared to older performance carburetors.</li>
<li><strong>High-Flow Design:</strong> The 42mm bore is perfectly sized for 80&#8243; to 95&#8243; engines, providing enough air for high-lift cams and headwork without sacrificing low-end torque.</li>
</ul>
<h3>Technical Fitment and Installation Notes</h3>
<p>This kit is specifically tailored for the 1990–1999 Evolution Big Twin production run.</p>
<ul>
<li><strong>Fitment:</strong> Fits Softail, Dyna, and Touring models equipped with the 1340cc Evolution engine.</li>
<li><strong>Standard Components:</strong> The kit includes the HSR 42mm carburetor, a specialized air cleaner backing plate adapter, and all necessary mounting hardware.</li>
<li><strong>Customization:</strong> Because the HSR42 is so popular, a wide array of jets and needles are available for riders at high altitudes or those with highly modified engines.</li>
<li><strong>Reliability:</strong> Built with high-quality gaskets and metal components designed to withstand the heat and vibration of an air-cooled V-twin.</li>
</ul>
<h3>Why Choose Mikuni for Your Evolution?</h3>
<p>Choosing the <strong>Mikuni HSR42 Easy Kit</strong> means choosing the &#8220;Rider’s Carburetor.&#8221; It is a piece of precision Japanese engineering designed to wake up the American soul of your Harley Evolution. You will experience easier starting, a more stable idle, and a ferocious pull through the mid-range that will make your Evo feel like a brand-new machine. Backed by decades of racing heritage, the HSR42 is the standard by which all other Harley carburetors are measured. Don&#8217;t settle for the restricted feel of a vacuum-operated carb. Step up to the smoothbore power of Mikuni and feel the difference on every twist of the throttle.</p>
<p><em>Note: It is recommended to check your spark plug color after the first 50 miles to ensure your jetting is optimal for your specific exhaust and air filter setup.</em></p>
</div>
<p>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin Evo</p>
<p>Get better motorcycle performance, more power and dependability, all with the Mikuni HSR42 Easy Carburetor Kit. Replace your stock CV carb with this two-piece throttle slide that rolls on stainless bearings for smoother operation, excellent response, and easier starting. The 42mm carburetor smoothbore Venturi creates great airflow, while the enlarged needle and seat provide extended full-throttle operation. The adjustable accelerator pump gives you instant throttle response at any RPM, and the light throttle return spring makes for easy pull operation. The Easy Carburetor Kit works with stock manifold and throttle cables, choke cable and air cleaner. This kit includes the carb adaptor. High-flow air filter is recommended for maximum performance.<br />
Features</p>
<p>Replaces stock CV carb<br />
Stainless bearings<br />
Pre-jetted 42mm carburetor smoothbore<br />
Enlarged needle and seat<br />
Instant throttle response at any RPM<br />
Easy pull operation<br />
Works with stock manifold and throttle cases<br />
Includes carb adaptor<br />
Use with high-flow air filter</p>
<p>&nbsp;</p>
<table class="sku-data ">
<thead class="sku-data__head-wrapper">
<tr class="sku-data__head-row">
<th class="sku-data__head-item" scope="col">Product Style</th>
<th class="sku-data__head-item" scope="col">AmericanV-twin Item #</th>
<th class="sku-data__head-item" scope="col">Catalog Number</th>
<th class="sku-data__head-item" scope="col">Store Sku</th>
<th class="sku-data__head-item" scope="col">MFR. Product #</th>
<th class="sku-data__head-item" scope="col">Availability</th>
</tr>
</thead>
<tbody class="sku-data__body-wrapper">
<tr class="sku-data__body-row">
<td class="sku-data__body-item">Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin Evo 1990-1999</td>
<td class="sku-data__body-item">222251</td>
<td class="sku-data__body-item">401-130</td>
<td class="sku-data__body-item">40425</td>
<td class="sku-data__body-item">42-7</td>
<td class="sku-data__body-item">In Stock: Ships within 24 hours</td>
</tr>
</tbody>
</table>
<p><strong>This Product Fits</strong></p>
<p>Harley Davidson<br />
    Dyna Convertible FXDS 1994, 1995, 1996, 1997, 1998<br />
    Dyna Glide Custom FXDC 1992<br />
    Dyna Glide Daytona FXDB-D 1992<br />
    Dyna Glide Sturgis FXDB-S 1991<br />
    Dyna Low Rider FXDL/I 1993-1998<br />
    Dyna Super Glide FXD/I 1995, 1996, 1997, 1998<br />
    Dyna Wide Glide FXDWG/I 1993-1998<br />
    Electra Glide Classic FLHTC/I 1990-1998<br />
    Electra Glide Sport FLHS 1990, 1991, 1992, 1993<br />
    Electra Glide Standard FLHT/I 1990-1998<br />
    Electra Glide Ultra Classic FLHTCU/I 1990-1998<br />
    FXR2 CVO/SE 1999<br />
    FXR3 CVO/SE 1999<br />
    FXR4 CVO/SE 2000<br />
    Low Glide/Low Rider FXRS 1990, 1991, 1992, 1993<br />
    Low Rider Custom FXLR 1990, 1991, 1992, 1993, 1994<br />
    Low Rider Sport FXRS-SP 1990, 1991, 1992, 1993<br />
    Road Glide FLTR/I 1998<br />
    Road King Classic FLHRC/I 1998<br />
    Road King FLHR/I 1994, 1995, 1996, 1997, 1998<br />
    Softail Bad Boy Springer FXSTSB 1995, 1996, 1997<br />
    Softail Custom FXSTC/I 1990-1999<br />
    Softail Deuce FXSTD/I 1999<br />
    Softail Fat Boy FLSTF/I 1990-1999<br />
    Softail Heritage Classic FLSTC/I 1990-1999<br />
    Softail Heritage FLST/I 1990<br />
    Softail Heritage Springer FLSTS/I 1997, 1998, 1999<br />
    Softail Night Train FXSTB/I 1999<br />
    Softail Nostalgia FLSTN/I 1993<br />
    Softail Special FLSTN/I 1994, 1995, 1996<br />
    Softail Springer FXSTS/I 1990-1999<br />
    Softail Standard FXST/I 1990, 1999<br />
    Sport Glide FXRT 1990, 1991, 1992<br />
    Super Glide FXR 1990, 1991, 1992, 1993, 1994<br />
    Tour Glide Classic FLTC/I 1990, 1991<br />
    Tour Glide Ultra Classic FLTCU/I 1990-1996 </p>
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		<title>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin Evo 1990-1999</title>
		<link>https://www.american-twin.com/product/mikuni-hsr42-easy-carburetor-kit-for-harley-big-twin-evo-1990-1999/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Sat, 06 Dec 2025 15:02:47 +0000</pubDate>
				<guid isPermaLink="false">https://www.american-twin.com/?post_type=product&#038;p=3051</guid>

					<description><![CDATA[Item: P997559 &#124; SKU: 10222251 
The Mikuni HSR42 Easy Carburetor Kit is the most popular and effective performance upgrade for 1990-1999 Harley-Davidson Evolution (Evo) Big Twin engines. This HSR42 smoothbore carburetor replaces the restrictive stock CV carb, delivering dramatic gains in horsepower, torque, and overall engine responsiveness.]]></description>
										<content:encoded><![CDATA[<h2>Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin Evo 1990-1999</h2>
<p>Mikuni HSR42 Easy Kit: Evo Big Twin Carburetor Upgrade</p>
<p>The <a href="https://www.american-twin.com/shop/">Mikuni HSR42 Easy Carburetor Kit</a> is the most popular and effective performance upgrade for 1990-1999 Harley-Davidson Evolution (Evo) Big Twin engines. This HSR42 smoothbore carburetor replaces the restrictive stock CV carb, delivering dramatic gains in horsepower, torque, and overall engine responsiveness.<br />
Product Highlights:</p>
<p>SMOOTHBORE Performance: The signature 42mm smoothbore design eliminates turbulence and maximizes airflow velocity, providing crisp, instant throttle response and superior acceleration across the entire RPM range.</p>
<p>Complete &#8220;Easy&#8221; Kit: Engineered for direct bolt-on installation on Evo Big Twins, the kit typically includes the HSR42 carb, a custom manifold, an adapter to use the stock air cleaner, and specific jetting for 1990–1999 Harley models.</p>
<p>Fuel Management Solution: Known for easier, more consistent tuning than stock or other aftermarket carbs, the Mikuni HSR42 provides stable idle quality and precise fuel metering.</p>
<p>Performance Reliability: A renowned carburetor conversion that significantly reduces flat spots and sluggishness, instantly unleashing the full potential of the Evolution V-Twin engine.</p>
<p>Upgrade your Evo Harley with the Mikuni HSR42 Easy Kit for a noticeable, reliable boost in power and performance.<br />
<a href="https://www.speed-talk.com/forum/viewtopic.php?t=59160&amp;start=15" target="_blank" rel="noopener">Mikuni HSR42</a> Easy Carburetor Kit For Harley Big Twin Evo</p>
<p>Get better motorcycle performance, more power and dependability, all with the Mikuni HSR42 Easy Carburetor Kit. Replace your stock CV carb with this two-piece throttle slide that rolls on stainless bearings for smoother operation, excellent response, and easier starting. The 42mm carburetor smoothbore Venturi creates great airflow, while the enlarged needle and seat provide extended full-throttle operation. The adjustable accelerator pump gives you instant throttle response at any RPM, and the light throttle return spring makes for easy pull operation. The Easy Carburetor Kit works with stock manifold and throttle cables, choke cable and air cleaner. This kit includes the carb adaptor. High-flow air filter is recommended for maximum performance.<br />
Features</p>
<p>Replaces stock CV carb<br />
Stainless bearings<br />
Pre-jetted 42mm carburetor smoothbore<br />
Enlarged needle and seat<br />
Instant throttle response at any RPM<br />
Easy pull operation<br />
Works with stock manifold and throttle cases<br />
Includes carb adaptor<br />
Use with high-flow air filter</p>
<table class="sku-data ">
<thead class="sku-data__head-wrapper">
<tr class="sku-data__head-row">
<th class="sku-data__head-item" scope="col">Product Style</th>
<th class="sku-data__head-item" scope="col">AmericanV-twin Item #</th>
<th class="sku-data__head-item" scope="col">Catalog Number</th>
<th class="sku-data__head-item" scope="col">Store Sku</th>
<th class="sku-data__head-item" scope="col">MFR. Product #</th>
<th class="sku-data__head-item" scope="col">Availability</th>
</tr>
</thead>
<tbody class="sku-data__body-wrapper">
<tr class="sku-data__body-row">
<td class="sku-data__body-item">Mikuni HSR42 Easy Carburetor Kit For Harley Big Twin Evo 1990-1999</td>
<td class="sku-data__body-item">10222251</td>
<td class="sku-data__body-item">401-130</td>
<td class="sku-data__body-item">340425</td>
<td class="sku-data__body-item">42-7</td>
<td class="sku-data__body-item">In Stock: Ships within 24 hours</td>
</tr>
</tbody>
</table>
<p><strong>This Product Fits</strong></p>
<p>Harley Davidson<br />
Dyna Convertible FXDS 1994, 1995, 1996, 1997, 1998<br />
Dyna Glide Custom FXDC 1992<br />
Dyna Glide Daytona FXDB-D 1992<br />
Dyna Glide Sturgis FXDB-S 1991<br />
Dyna Low Rider FXDL/I 1993-1998<br />
Dyna Super Glide FXD/I 1995, 1996, 1997, 1998<br />
Dyna Wide Glide FXDWG/I 1993-1998<br />
Electra Glide Classic FLHTC/I 1990-1998<br />
Electra Glide Sport FLHS 1990, 1991, 1992, 1993<br />
Electra Glide Standard FLHT/I 1990-1998<br />
Electra Glide Ultra Classic FLHTCU/I 1990-1998<br />
FXR2 CVO/SE 1999<br />
FXR3 CVO/SE 1999<br />
FXR4 CVO/SE 2000<br />
Low Glide/Low Rider FXRS 1990, 1991, 1992, 1993<br />
Low Rider Custom FXLR 1990, 1991, 1992, 1993, 1994<br />
Low Rider Sport FXRS-SP 1990, 1991, 1992, 1993<br />
Road Glide FLTR/I 1998<br />
Road King Classic FLHRC/I 1998<br />
Road King FLHR/I 1994, 1995, 1996, 1997, 1998<br />
Softail Bad Boy Springer FXSTSB 1995, 1996, 1997<br />
Softail Custom FXSTC/I 1990-1999<br />
Softail Deuce FXSTD/I 1999<br />
Softail Fat Boy FLSTF/I 1990-1999<br />
Softail Heritage Classic FLSTC/I 1990-1999<br />
Softail Heritage FLST/I 1990<br />
Softail Heritage Springer FLSTS/I 1997, 1998, 1999<br />
Softail Night Train FXSTB/I 1999<br />
Softail Nostalgia FLSTN/I 1993<br />
Softail Special FLSTN/I 1994, 1995, 1996<br />
Softail Springer FXSTS/I 1990-1999<br />
Softail Standard FXST/I 1990, 1999<br />
Sport Glide FXRT 1990, 1991, 1992<br />
Super Glide FXR 1990, 1991, 1992, 1993, 1994<br />
Tour Glide Classic FLTC/I 1990, 1991<br />
Tour Glide Ultra Classic FLTCU/I 1990-1996</p>
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