Boyesen
Boyesen is a trusted performance brand known for its innovative intake systems, reed technology and engine components engineered for sharper throttle response and improved airflow. Their Rad Valve reed cages, Power Reeds and Super Stock kits unlock reliable power gains for dirt bikes, ATVs and two-stroke machines. Riders trust Boyesen for precision fitment, increased engine efficiency and race-ready durability. Upgrade with Boyesen to achieve cleaner combustion and stronger low- to mid-range performance.
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Boyesen - WPK-07M - Impeller/Waterpump Cover - Magnesium - Fits Honda 2004-2009 CRF250R, 2004-2017 CRF250X
Boyesen
$194.95Boyesen - 09400263 - Impeller/Waterpump Cover - Magnesium - HondaFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all rpm...$194.95 -
Out of stock
Boyesen - WPC-12DM - Water Pump Cover - Magnesium - KX250
Boyesen
$129.95Boyesen - 09400473 - Water Pump Cover - Magnesium - KX250FeaturesSpecsBase FinishPowder-CoatedColor/FinishMagnesiumColor/FinishPowder-CoatedProduct NameCoverUnitsEachMaterialAluminumRiding...$129.95 -
Out of stock
Boyesen - CC-46M - Clutch Cover - Magnesium - Husqvarna/KTM - Fits 2014-2017 Husqvarna TC 85, 2006-2017 KTM 85 SX, 2006-2012 KTM 105 SX
Boyesen
$95.95Boyesen - 09400694 - Clutch Cover - Magnesium - Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Boyesen - CC-07AM - Clutch Cover - Magnesium - Fits 2010-2017 Honda CRF250R
Boyesen
$117.95Boyesen - 09400969 - Clutch Cover - Magnesium - HondaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$117.95 -
Out of stock
Boyesen - CC-44B - Clutch Cover - Black - Husaberg/KTM - Fits 2013 Husqvarna FE 250, 2005-2012 KTM 250 SX-F, 2007-2013 KTM 250 XCF-W
Boyesen
$95.95Boyesen - 09400570 - Clutch Cover - Black - Husaberg/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - WPK-26AM - Impeller/Waterpump Cover - Magnesium - Fits 2017-2019 Suzuki RMX450Z 10
Boyesen
$229.95Boyesen - 09400862 - Impeller/Waterpump Cover - Magnesium - SuzukiFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all...$229.95 -
Out of stock
Boyesen - CC-27AM - Clutch Cover - Magnesium - Fits 2007-2024 Suzuki RM-Z250
Boyesen
$95.95Boyesen - 09400683 - Clutch Cover - Magnesium - SuzukiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - CC-06XM - Clutch Cover - Magnesium - Fits 2005-2016 Honda CRF450X
Boyesen
$95.95Boyesen - 09400615 - Clutch Cover - Magnesium - HondaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Out of stock
Boyesen - WPK-06B - Impeller/Waterpump Cover - Black - Fits 2002-2008 Honda CRF450R
Boyesen
$194.95Boyesen - 09400397 - Impeller/Waterpump Cover - Black - HondaFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all rpm...$194.95 -
Out of stock
Boyesen - CC-12CB - Clutch Cover - Black - Fits 2005-2007 Kawasaki KX250
Boyesen
$95.95Boyesen - 09400389 - Clutch Cover - Black - KawasakiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Out of stock
Boyesen - WPK-10B - Impeller/Waterpump Cover - Black - Kawasaki/Suzuki - Fits 2001-2025 Kawasaki KX85, 2001-2021 Kawasaki KX100, 2022-2025 Kawasaki KX112, 2003-2005 Suzuki RM100
Boyesen
$194.95Boyesen - 09400469 - Impeller/Waterpump Cover - Black - Kawasaki/SuzukiFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at...$194.95 -
Out of stock
Boyesen - CC-32AM - Clutch Cover - Magnesium - Fits Yamaha 1999-2025 YZ250, 2016-2025 YZ250X, 1999-2022 YZ250X
Boyesen
$95.95Boyesen - 09400236 - Clutch Cover - Magnesium - YamahaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - SC-12AM - Ignition Cover - Magnesium - Kawasaki KX250 - Fits 2005-2007 Kawasaki KX250
Boyesen
$87.95Boyesen - 09400381 - Ignition Cover - Magnesium - Kawasaki KX250FeaturesSeals properly, guarding inside of engine from dirt and water and outlasts stock coversBoyesen Factory Covers are cast from the...$87.95 -
Out of stock
Boyesen - SC-33AB - Ignition Cover - Black - Fits Yamaha 2005-2025 YZ125, 2020-2025 YZ125X
Boyesen
$87.95Boyesen - 09400383 - Ignition Cover - Black - YamahaFeaturesSeals properly, guarding inside of engine from dirt and water and outlasts stock coversBoyesen Factory Covers are cast from the highest...$87.95 -
Boyesen - CC-11AM - Clutch Cover - Magnesium - Fits 2003-2007 Kawasaki KX125
Boyesen
$95.95Boyesen - 09400228 - Clutch Cover - Magnesium - KawasakiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Out of stock
Boyesen - CC-37B - Clutch Cover - Black - Fits Yamaha 2001-2013 WR250F, 2001-2013 YZ250F
Boyesen
$95.95Boyesen - 09400234 - Clutch Cover - Black - YamahaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - CC-21AM - Clutch Cover - Magnesium - Fits 1998-2008 Suzuki RM125
Boyesen
$95.95Boyesen - 09400231 - Clutch Cover - Magnesium - SuzukiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - CC-37M - Clutch Cover - Magnesium - Fits Yamaha 2001-2013 WR250F, 2001-2013 YZ250F
Boyesen
$95.95Boyesen - 09400235 - Clutch Cover - Magnesium - YamahaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Out of stock
Boyesen - CC-12M - Clutch Cover - Magnesium - Fits 1993-2002 Kawasaki KX250
Boyesen
$95.95Boyesen - 09400229 - Clutch Cover - Magnesium - KawasakiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Out of stock
Boyesen - SC-01AM - Ignition Cover - Magnesium - Honda CR125R
Boyesen
$87.95Boyesen - 09400209 - Ignition Cover - Magnesium - Honda CR125RFeaturesSeals properly, guarding inside of engine from dirt and water and outlasts stock coversBoyesen Factory Covers are cast from the...$87.95 -
Boyesen - PRO-206 - Pro Series Reed Set - Kawasaki
Boyesen
$62.95Boyesen - 10080049 - Pro Series Reed Set - KawasakiFeaturesHigh-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed designOffers the quickest acceleration any reed can...$62.95 -
Boyesen - CCG-46 - Clutch Cover Replacement Gasket - Husqvarna/KTM
Boyesen
$7.00Boyesen - 09341283 - Clutch Cover Replacement Gasket - Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for...$7.00 -
Out of stock
Boyesen - PRO-216 - Pro Series Reed Set - Kawasaki
Boyesen
$62.95Boyesen - 10080100 - Pro Series Reed Set - KawasakiFeaturesHigh-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed designOffers the quickest acceleration any reed can...$62.95 -
Boyesen - PRO-200 - Pro Series Reed Set - Fits 2004 Honda CR250R
Boyesen
$69.95Boyesen - 10080046 - Pro Series Reed Set - HondaFeaturesHigh-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed designOffers the quickest acceleration any reed can...$69.95 -
Out of stock
Boyesen - PRO-217 - Pro Series Reed Set - Yamaha
Boyesen
$62.95Boyesen - 10080101 - Pro Series Reed Set - YamahaFeaturesHigh-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed designOffers the quickest acceleration any reed can...$62.95 -
Out of stock
Boyesen - 6129 - Power Reed Petal Set - Fits 2005-2007 Kawasaki KX250
Boyesen
$39.95Boyesen - 10080095 - Power Reed Petal Set - KawasakiFeaturesThe top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMsThe stiffer, bottom reed is ported to...$39.95 -
Out of stock
Boyesen - PRO-215 - Pro Series Reed Set - Fits 2005-2007 Honda CR250R
Boyesen
$62.95Boyesen - 10080099 - Pro Series Reed Set - HondaFeaturesHigh-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed designOffers the quickest acceleration any reed can...$62.95 -
Out of stock
Boyesen - PRO-208 - Pro Series Reed Set - Fits 2004-2008 Suzuki RM125
Boyesen
$62.95Boyesen - 10080050 - Pro Series Reed Set - SuzukiFeaturesHigh-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed designOffers the quickest acceleration any reed can...$62.95 -
Boyesen - 6107 - Power Reed Petal Set - Polini - Fits 1999-2004 KTM 50 (2 petal)
Boyesen
$28.95Boyesen - 10080091 - Power Reed Petal Set - PoliniFeaturesThe top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMsThe stiffer, bottom reed is ported to...$28.95 -
Out of stock
Boyesen - 6119 - Power Reed Petal Set - Yamaha
Boyesen
$39.95Boyesen - 10080043 - Power Reed Petal Set - YamahaFeaturesThe top reed is lightweight and resilient for crisp throttle response at partial throttle or low RPMsThe stiffer, bottom reed is ported to...$39.95 -
Boyesen - CCG-06X - Clutch Cover Replacement Gasket - Honda
Boyesen
$7.00Boyesen - 09340959 - Clutch Cover Replacement Gasket - HondaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$7.00 -
Out of stock
Boyesen - CCG-42 - Clutch Cover Replacement Gasket - Husaberg/Husqvarna/KTM
Boyesen
$7.00Boyesen - 09341291 - Clutch Cover Replacement Gasket - Husaberg/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually...$7.00 -
Out of stock
Boyesen - SCG-42 - Ignition Cover Replacement Gasket - KTM
Boyesen
$5.95Boyesen - 09341290 - Ignition Cover Replacement Gasket - KTMFeaturesSeals properly, guarding inside of engine from dirt and water and outlasts stock coversBoyesen Factory Covers are cast from the...$5.95 -
Out of stock
Boyesen - CC22B - Clutch Cover - Black - Suzuki
Boyesen
$95.95Boyesen - CC22B - Clutch Cover - Black - SuzukiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect, leak-free...$95.95 -
Boyesen - PSR-89 - Pro Series Reed Set - Suzuki
Boyesen
$64.95Boyesen - PRO89 - Pro Series Reed Set - SuzukiFeaturesHigh-tech carbon fiber with all the advantages of Boyesen's exclusive dual-stage reed designOffers the quickest acceleration any reed can offer;...$64.95 -
Out of stock
Boyesen - CC-22M - Clutch Cover - Magnesium - Suzuki
Boyesen
$95.95Boyesen - 09400232 - Clutch Cover - Magnesium - SuzukiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Out of stock
Boyesen - WPK-44B - Impeller/Waterpump Cover - Black - Husaberg/Husqvarna/KTM - Multiple Husqvarna/KTM Models
Boyesen
$194.95Boyesen - 09401234 - Impeller/Waterpump Cover - Black - Husaberg/Husqvarna/KTMFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the...$194.95 -
Boyesen - CC-44AO - Clutch Cover - Orange - KTM
Boyesen
$105.95Boyesen - 09401233 - Clutch Cover - Orange - KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect, leak-free...$105.95 -
Out of stock
Boyesen - WPK-44O - Impeller/Waterpump Cover - Orange - KTM EXC-F, SX-F, XCF-W & More
Boyesen
$199.95Boyesen - 09401236 - Impeller/Waterpump Cover - Orange - KTMFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all rpm...$199.95 -
Out of stock
Boyesen - WPK-44M - Impeller/Waterpump Cover - Magnesium - Husaberg/Husqvarna/KTM - Multiple Husqvarna/KTM Models
Boyesen
$194.95Boyesen - 09401235 - Impeller/Waterpump Cover - Magnesium - Husaberg/Husqvarna/KTMFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing...$194.95
Boyesen Intake Systems, Reed Sets & Engine Components – Performance, Throttle Response & Durability
Boyesen is a longtime leader in performance intake and reed technology, designing components that enhance airflow, combustion efficiency and throttle response for motocross, trail and ATV applications. Their engineered solutions support both two-stroke and four-stroke platforms and are built to deliver measurable improvements in power, consistency and overall ride quality. Every Boyesen product is developed with precision fitment in mind, ensuring dependable, model-specific compatibility.
Core products such as the Rad Valve Reed Cage Assembly, Power Reeds and Super Stock reed sets are designed to improve low-end torque, smooth mid-range pull and sharpen throttle control. Boyesen offers tailored reed solutions for major manufacturers including Honda, Yamaha, Suzuki, Kawasaki, KTM, Polaris and Can-Am, helping optimize port timing and combustion efficiency. The brand also produces durable clutch covers, water pump/impeller covers and throttle-enhancing accessories built to withstand high-RPM stress and demanding off-road conditions.
Trusted by riders, tuners and racers worldwide, Boyesen combines proven engineering with durable materials to deliver consistent performance gains and long-term reliability. Whether upgrading a stock intake or building a performance-focused machine, Boyesen components offer smoother power delivery, reduced hesitation and improved engine control. Their commitment to airflow optimization and durability makes Boyesen a top choice for anyone seeking dependable, race-ready power upgrades.