RFX Pro Series Elite Aluminum Sprocket - 420: manufacturer reference FXRS 56-51 99OR. Designed for off-road and motocross applications, this RFX sprocket combines lightweight and durability thanks to CNC machined construction from 7075 aluminum. Its CAD profile optimizes material to reduce weight without compromising stiffness, while the orange anodization gives it a racing look and better resistance to external aggressions.
- Material: CNC machined 7075 aluminum
- Number of teeth: 51
- Chain pitch: 420
- Color: anodized orange (RFX color code)
- Laser-etched RFX logo
- Mud evacuation grooves to limit clogging and wear
- CAD profile and tight tolerances for precise geometry and better rotational stability
This sprocket fits into a performance-oriented drivetrain with easy maintenance: the grooves facilitate mud evacuation in muddy terrains, and the rigid design increases resistance to torsion under load. Compatible with motocross applications, it is particularly suited for models such as KTM 65 SX (2022-2023) and KTM 60 SX (2000), but please verify exact compatibility with your model before installation.
30 days returns
Help and contacts
Motorbike
Log in
Basket
'%3e%3cpath%20fill='%23f1ab00'%20d='M.702%207.162l1.875%201.684%206.161-5.532L14.9%208.846l1.875-1.684L8.738-.053z'/%3e%3c/g%3e%3c/g%3e%3c/svg%3e)
Secure payments
;}.cls-1,.cls-2,.cls-3,.cls-4{stroke-width:0px;}.cls-2{fill:%231e3764;}.cls-3{fill:url(%23Bancontact_geel_rgb);}.cls-4{fill:%23fff;}%3c/style%3e%3clinearGradient%20id='Bancontact_blauw_rgb'%20x1='10.63'%20y1='11.48'%20x2='20.14'%20y2='7.95'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20offset='0'%20stop-color='%23005ab9'/%3e%3cstop%20offset='1'%20stop-color='%231e3764'/%3e%3c/linearGradient%3e%3clinearGradient%20id='Bancontact_geel_rgb'%20x1='21.79'%20y1='9.08'%20x2='31.88'%20y2='5.64'%20gradientUnits='userSpaceOnUse'%3e%3cstop%20offset='0'%20stop-color='%23fba900'/%3e%3cstop%20offset='1'%20stop-color='%23ffd800'/%3e%3c/linearGradient%3e%3c/defs%3e%3cg%20id='Calque_1-2'%3e%3crect%20class='cls-4'%20width='42'%20height='24'%20rx='2'%20ry='2'/%3e%3cpath%20id='Bancontact'%20class='cls-2'%20d='M8,19.49v-3.76h1.16c.84,0,1.38.32,1.38.97,0,.37-.17.63-.41.78.35.16.55.47.55.9,0,.76-.55,1.11-1.41,1.11h-1.27ZM8.75,17.29h.55c.34,0,.48-.17.48-.47,0-.33-.26-.43-.62-.43h-.42v.91ZM8.75,18.83h.46c.45,0,.71-.11.71-.47s-.23-.49-.65-.49h-.53v.96ZM12.13,19.55c-.74,0-1.11-.36-1.11-.84,0-.53.43-.84,1.08-.85.15,0,.34.02.48.04v-.13c0-.33-.19-.48-.55-.48-.24,0-.49.04-.71.13l-.13-.58c.23-.1.6-.16.93-.16.79,0,1.18.42,1.18,1.14v1.49c-.22.11-.63.24-1.17.24ZM12.58,18.94v-.57c-.12-.03-.25-.04-.38-.04-.25,0-.44.1-.44.35,0,.23.16.34.45.34.16,0,.3-.03.38-.08ZM13.82,19.49v-2.57c.34-.14.8-.24,1.21-.24.78,0,1.23.39,1.23,1.1v1.71h-.74v-1.65c0-.37-.17-.54-.5-.54-.17,0-.33.03-.47.1v2.1h-.74ZM18.85,16.84l-.14.58c-.2-.09-.42-.13-.61-.13-.43,0-.67.31-.67.81,0,.55.25.84.71.84.18,0,.39-.05.6-.14l.12.6c-.18.09-.46.16-.77.16-.89,0-1.41-.55-1.41-1.43s.51-1.44,1.36-1.44c.31,0,.61.07.81.16ZM20.45,19.55c-.83,0-1.34-.57-1.34-1.44s.52-1.43,1.34-1.43,1.34.57,1.34,1.43-.5,1.44-1.34,1.44ZM20.45,18.94c.38,0,.58-.32.58-.83s-.2-.82-.58-.82-.58.32-.58.82.21.83.58.83ZM22.22,19.49v-2.57c.34-.14.8-.24,1.21-.24.78,0,1.23.39,1.23,1.1v1.71h-.74v-1.65c0-.37-.17-.54-.5-.54-.17,0-.33.03-.47.1v2.1h-.74ZM26.33,19.55c-.64,0-.97-.35-.97-1.06v-1.16h-.36v-.59h.36v-.6l.74-.04v.63h.6v.59h-.6v1.15c0,.31.13.46.37.46.11,0,.21-.02.28-.03l.04.6c-.13.03-.3.05-.47.05ZM28.2,19.55c-.74,0-1.11-.36-1.11-.84,0-.53.43-.84,1.08-.85.15,0,.34.02.48.04v-.13c0-.33-.19-.48-.55-.48-.24,0-.49.04-.71.13l-.13-.58c.23-.1.6-.16.93-.16.79,0,1.18.42,1.18,1.14v1.49c-.22.11-.63.24-1.17.24ZM28.65,18.94v-.57c-.12-.03-.25-.04-.38-.04-.25,0-.44.1-.44.35,0,.23.16.34.45.34.16,0,.3-.03.38-.08ZM31.91,16.84l-.14.58c-.2-.09-.42-.13-.61-.13-.43,0-.67.31-.67.81,0,.55.25.84.71.84.18,0,.39-.05.6-.14l.12.6c-.18.09-.46.16-.77.16-.89,0-1.41-.55-1.41-1.43s.51-1.44,1.36-1.44c.31,0,.61.07.81.16ZM33.53,19.55c-.64,0-.97-.35-.97-1.06v-1.16h-.36v-.59h.36v-.6l.74-.04v.63h.6v.59h-.6v1.15c0,.31.13.46.37.46.11,0,.21-.02.28-.03l.04.6c-.13.03-.3.05-.47.05Z'/%3e%3cpath%20id='blue-symbol'%20class='cls-1'%20d='M13.16,13.85c3.92,0,5.88-2.61,7.84-5.22H8v5.22h5.16Z'/%3e%3cpath%20id='yellow-symbol'%20class='cls-3'%20d='M28.84,3.4c-3.92,0-5.88,2.61-7.84,5.22h13V3.4h-5.16Z'/%3e%3c/g%3e%3c/svg%3e)
'%3e%3cpath%20fill='%23FFFFFF'%20d='M0%204.053l1.054.946%203.461-3.108L7.976%205l1.054-.946L4.515%200z'/%3e%3c/g%3e%3c/svg%3e)
French
Spanish
Italian
Dutch
German'/%3e%3c/g%3e%3cg%20id='eu-c'%3e%3cuse%20xlink:href='%23eu-b'%20transform='rotate(72)'/%3e%3cuse%20xlink:href='%23eu-b'%20transform='rotate(144)'/%3e%3c/g%3e%3cuse%20xlink:href='%23eu-c'%20transform='scale(-1%201)'/%3e%3c/g%3e%3c/defs%3e%3cpath%20fill='%23039'%20d='M0%200h640v480H0z'/%3e%3cg%20fill='%23fc0'%20transform='translate(320%20242.3)scale(23.7037)'%3e%3cuse%20xlink:href='%23eu-d'%20width='100%25'%20height='100%25'%20y='-6'/%3e%3cuse%20xlink:href='%23eu-d'%20width='100%25'%20height='100%25'%20y='6'/%3e%3cg%20id='eu-e'%3e%3cuse%20xlink:href='%23eu-d'%20width='100%25'%20height='100%25'%20x='-6'/%3e%3cuse%20xlink:href='%23eu-d'%20width='100%25'%20height='100%25'%20transform='rotate(-144%20-2.3%20-2.1)'/%3e%3cuse%20xlink:href='%23eu-d'%20width='100%25'%20height='100%25'%20transform='rotate(144%20-2.1%20-2.3)'/%3e%3cuse%20xlink:href='%23eu-d'%20width='100%25'%20height='100%25'%20transform='rotate(72%20-4.7%20-2)'/%3e%3cuse%20xlink:href='%23eu-d'%20width='100%25'%20height='100%25'%20transform='rotate(72%20-5%20.5)'/%3e%3c/g%3e%3cuse%20xlink:href='%23eu-e'%20width='100%25'%20height='100%25'%20transform='scale(-1%201)'/%3e%3c/g%3e%3c/svg%3e)
Others
