RFX Pro Series Armalite Rear Sprocket Honda CR125-500 CRF250-450 83-16


In stock


RFX Pro Series Armalite Rear Sprocket 

RFX Pro Series Armalite sprockets are designed and tested at the highest level by top World and British championship race teams.

New dual ring design gives the ultimate sprocket performance, reduced weight thanks to a 7075-T6 aluminium centre and long lasting teeth life thanks to the high carbon steel outer.

Armalite sprockets also feature a hexagon drive interface between the inner and outer ring, this is revolutionary technology for sprockets and maximises drive between the two parts and reduces the force on the rivets to zero unlike the competition.  

Pro Series Armalite Sprocket Features:-

  • CNC 7075 Aerospace aluminium Inner ring
  • HCS Outer Ring
  • Hex-Drive location between inner & outer ring
  • CAD designed profile for lightness.
  • New style mud clearing grooves to reduce wear.
  • Rigid design increases torsional strength.
  • Colour anodised for that factory bike look.


Fitting Instructions 

  • Start with bike on a stand with the rear wheel raised from the ground.
  • Remove chain and wheel from bike.
  • While holding the Hex key loosen the nuts with a spanner.
  • Remove all nuts and old sprocket.
  • Clean around the hub making sure clean and free of debris.
  • Take the new sprocket and place on hub ensuring a nice snug fit making sure the bolt holes are in position.
  • Clean sprocket bolts & nuts.
  • Apply Blue Loctite to each bolt and insert in the holes.
  • Thread nuts on to bolts by hand ensuring locking seals are intact and in good condition.
  • Hold Hex key in place and tighten nuts even pattern.
  • Torque nuts and bolts in accordance to your owner’s manual.
  • Put wheel back in bike making sure chain is corrected aligned and tightened to manufacturer’s specification.  



Brand RFX
Width 30cm
Height 30cm
Weight 1kg
Condition New

Delivery & Returns


UK mainland delivery: £7.95

Order before 3pm and your order will be delivered to UK mainland within 48 hours. We can only delivery to addresses within the UK. For more details, please read our delivery information or contact us if you have any queries.

Spend over £150.00 to qualify for FREE UK delivery on your order.


Returns must be notified within 3 days of delivery date. For more details, please read our returns policy or contact us if you have any queries.

Back to top


Need help? 01706 848946

Open today 10am-5pm

Top sellers

Top brands

Get in touch with SaddMX

Unit 1 Moss Industrial Estate
Heyside Royton

Phone: 01706 848946

View opening hours

This website uses cookies. By continuing to browse this website, you agree to our use of cookies.