Reference: FXRS 51-46 99BK — RFX Pro Series Elite aluminum sprocket - 428. Designed for off-road and motocross, this CNC machined sprocket meets RFX standards for mounting on a 428 transmission.
- Material: CNC machined 7075 aluminum, black anodization.
- Number of teeth: 46 teeth (optimized CAD profile).
- Chain pitch: 428, standard type.
- Machining: RFX logo laser engraved, tight tolerances for precise alignment.
- Design: mud evacuation grooves to preserve the lifespan of the chain and sprocket.
- Mechanical features: rigid design reducing deformation and lightweight profile to limit unsprung weight.
Designed for motocross riders and enthusiasts of competitive small-displacement bikes, this black sprocket easily integrates with 428 transmissions and offers a professional look thanks to its anodization. The CAD profile and CNC machining ensure reproducible geometry, useful in muddy conditions where quick evacuation is crucial.
Compatibility (examples): KTM 85 SX STD WHEELS 17/14 (2025), HUSQVARNA TC 85 STD WHEELS 17/14 (2025), GAS GAS MC 85 19/16 (2025). Check the number of teeth and chain pitch 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
