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 - CC-44AB - Clutch Cover - Black - Husaberg/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401231 - Clutch Cover - Black - Husaberg/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Boyesen - SC-41AB - Ignition Cover - Black - Husaberg/Husqvarna/KTM
Boyesen
$87.95Boyesen - 09401266 - Ignition Cover - Black - Husaberg/Husqvarna/KTMFeaturesSeals properly, guarding inside of engine from dirt and water and outlasts stock coversBoyesen Factory Covers are cast from...$87.95 -
Out of stock
Boyesen - CC-45B - Clutch Cover - Black - Husaberg/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401263 - Clutch Cover - Black - Husaberg/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Boyesen - CC-45M - Clutch Cover - Magnesium - Husaberg/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401264 - Clutch Cover - Magnesium - Husaberg/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced...$95.95 -
Boyesen - CC-41B - Clutch Cover - Black - Husaberg/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401228 - Clutch Cover - Black - Husaberg/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Out of stock
Boyesen - RAD-40B - Rad Valve Reed Cage Assembly - Gas Gas/Husqvarna/KTM
Boyesen
$169.95Boyesen - 10080288 - Rad Valve Reed Cage Assembly - Gas Gas/Husqvarna/KTMFeaturesMade of one-piece aluminum castings and bolts in easily; no modifications necessaryProvide quicker, sharper throttle...$169.95 -
Boyesen - PSR-040 - Replacement Pro Series Reed Set - RAD-40B - Gas Gas/Husqvarna/KTM
Boyesen
$55.95Boyesen - 10080289 - Replacement Pro Series Reed Set - RAD-40B - Gas Gas/Husqvarna/KTMFeaturesResponds quickly and accurately to changes in piston speed for smooth, dependable throttle responseOffers...$55.95 -
Boyesen - CC-41M - Clutch Cover - Magnesium - Husaberg/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401229 - Clutch Cover - Magnesium - Husaberg/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced...$95.95 -
Boyesen - SC-40AM - Ignition Cover - Magnesium - Gas Gas/Husqvarna/KTM
Boyesen
$87.95Boyesen - 09401226 - Ignition Cover - Magnesium - Gas Gas/Husqvarna/KTMFeaturesSeals properly, guarding inside of engine from dirt and water and outlasts stock coversBoyesen Factory Covers are cast...$87.95 -
Out of stock
Boyesen - CC-41O - Clutch Cover - Orange - KTM
Boyesen
$105.95Boyesen - 09401230 - Clutch Cover - Orange - KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect, leak-free...$105.95 -
Boyesen - CCG-44A - Clutch Cover Replacement Gasket - KTM
Boyesen
$7.00Boyesen - 09343125 - Clutch Cover Replacement Gasket - KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$7.00 -
Boyesen - CCG-41 - Clutch Cover Replacement Gasket - Husaberg/Husqvarna/KTM
Boyesen
$7.00Boyesen - 09343124 - Clutch Cover Replacement Gasket - Husaberg/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually...$7.00 -
Boyesen - WPK-38CB - Impeller/Waterpump Cover - Black - Yamaha
Boyesen
$219.95Boyesen - 09401368 - Impeller/Waterpump Cover - Black - YamahaFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all rpm...$219.95 -
Out of stock
Boyesen - SCG-40A - Ignition Cover Replacement Gasket - Gas Gas/Husqvarna/KTM
Boyesen
$5.95Boyesen - 09343123 - Ignition Cover Replacement Gasket - Gas Gas/Husqvarna/KTMFeaturesSeals properly, guarding inside of engine from dirt and water and outlasts stock coversBoyesen Factory Covers are...$5.95 -
Boyesen - WPK-45O - Impeller/Waterpump Cover - Orange - KTM
Boyesen
$199.95Boyesen - 09401365 - 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 -
Boyesen - WPK-37AB - Impeller/Waterpump Cover - Black - Yamaha
Boyesen
$219.95Boyesen - 09401366 - Impeller/Waterpump Cover - Black - YamahaFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all rpm...$219.95 -
Boyesen - CC-37AB - Clutch Cover - Black - Yamaha
Boyesen
$95.95Boyesen - 09401370 - Clutch Cover - Black - YamahaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - SSC-341 - Super Stock Reed Set - Carbon - Husaberg/Husqvarna/KTM
Boyesen
$59.95Boyesen - 10080294 - Super Stock Reed Set - Carbon - Husaberg/Husqvarna/KTMFeaturesEnhance performance at all rpmMatched to OEM specificationsSpecsModelSuper StockColor/FinishBlackRiding...$59.95 -
Boyesen - WPK-45M - Impeller/Waterpump Cover - Magnesium - Husaberg/Husqvarna/KTM
Boyesen
$194.95Boyesen - 09401364 - 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 -
Out of stock
Boyesen - CC-37AM - Clutch Cover - Magnesium - Yamaha
Boyesen
$95.95Boyesen - 09401371 - 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 - WPK-45B - Impeller/Waterpump Cover - Black - Husaberg/Husqvarna/KTM
Boyesen
$194.95Boyesen - 09401363 - 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 - WPK-38CM - Impeller/Waterpump Cover - Magnesium - Yamaha
Boyesen
$219.95Boyesen - 09401369 - Impeller/Waterpump Cover - Magnesium - YamahaFeaturesThis high-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all...$219.95 -
Boyesen - CC-41AB - Clutch Cover - Black - Gas Gas/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401453 - Clutch Cover - Black - Gas Gas/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Out of stock
Boyesen - CC-18AM - Clutch Cover - Magnesium - Kawasaki
Boyesen
$95.95Boyesen - 09401466 - Clutch Cover - Magnesium - KawasakiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - CC-45AB - Clutch Cover - Black - Gas Gas/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401461 - Clutch Cover - Black - Gas Gas/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Boyesen - CC-18AB - Clutch Cover - Black - Kawasaki
Boyesen
$95.95Boyesen - 09401465 - Clutch Cover - Black - KawasakiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - CC-44CB - Clutch Cover - Black - Gas Gas/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401457 - Clutch Cover - Black - Gas Gas/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Boyesen - CC-45AM - Clutch Cover - Magnesium - Gas Gas/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401462 - Clutch Cover - Magnesium - Gas Gas/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for...$95.95 -
Out of stock
Boyesen - WPK-31AB - Impeller Water Pump Cover - Black - Yamaha
Boyesen
$219.95Boyesen - 09401471 - Impeller Water Pump Cover - Black - YamahaFeaturesHigh-flow, hydrodynamic water pump kit has been tested and designed to flow more coolantBy increasing the flow at all rpm...$219.95 -
Out of stock
Boyesen - CC-44CM - Clutch Cover - Magnesium - Gas Gas/Husqvarna/KTM
Boyesen
$95.95Boyesen - 09401458 - Clutch Cover - Magnesium - Gas Gas/Husqvarna/KTMFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for...$95.95 -
Boyesen - CC-07B - Clutch Cover - Black - Honda
Boyesen
$95.95Boyesen - 09400442 - Clutch Cover - Black - HondaFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a perfect,...$95.95 -
Boyesen - CC-17M - Clutch Cover - Magnesium - Kawasaki/Suzuki
Boyesen
$95.95Boyesen - 09400446 - Clutch Cover - Magnesium - Kawasaki/SuzukiFeaturesLightweight factory clutch covers provide years of outstanding protection; guaranteed not to warpIndividually surfaced for a...$95.95 -
Boyesen - HST-001 - Hot Start Trigger - KTM
Boyesen
$29.95Boyesen - 06120078 - Hot Start Trigger - KTMFeaturesReconfigured and resized to reduce accidental engagements on your 4-stroke vehicleReplaces plastic lever with cast aluminum, along with a new...$29.95 -
Out of stock
Boyesen - 622 - Power Reed Set - Kawasaki/Suzuki
Boyesen
$28.95Boyesen - 622 - Power Reed Set - Kawasaki/SuzukiFeaturesThey permit greater flow velocity over the entire range of operating pressuresIncreased performance from start-up to top...$28.95 -
Boyesen - 627 - Power Reed Set - Yamaha
Boyesen
$34.95Boyesen - 627 - Power Reed Set - YamahaFeaturesThey permit greater flow velocity over the entire range of operating pressuresIncreased performance from start-up to top...$34.95 -
Out of stock
Boyesen - 620 - Power Reed Set - Kawasaki/Yamaha
Boyesen
$28.95Boyesen - 620 - Power Reed Set - Kawasaki/YamahaFeaturesThey permit greater flow velocity over the entire range of operating pressuresIncreased performance from start-up to top...$28.95 -
Boyesen - 691 - Power Reed Set - Kawasaki
Boyesen
$39.95Boyesen - 691 - Power Reed Set - KawasakiFeaturesThey permit greater flow velocity over the entire range of operating pressuresIncreased performance from start-up to top accelerationSpecsUnitsSetBase...$39.95 -
Boyesen - 608 - Power Reed Set - Cagiva/Husqvarna/Kawasaki/Suzuki
Boyesen
$39.95Boyesen - 608 - Power Reed Set - Cagiva/Husqvarna/Kawasaki/SuzukiFeaturesThey permit greater flow velocity over the entire range of operating pressuresIncreased performance from start-up to top...$39.95 -
Boyesen - 674 - Power Reed Set - Yamaha
Boyesen
$22.95Boyesen - 674 - Power Reed Set - YamahaFeaturesThey permit greater flow velocity over the entire range of operating pressuresIncreased performance from start-up to top accelerationSpecsBase...$22.95 -
Boyesen - 695 - Power Reed Set - Honda
Boyesen
$39.95Boyesen - 695 - Power Reed Set - HondaFeaturesThey permit greater flow velocity over the entire range of operating pressuresIncreased performance from start-up to top accelerationSpecsBase...$39.95
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.