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Home > Products > Rear Sprocket > RFE > SUPERSPROX STEEL REAR SPROCKET RFE-478:40-BLK


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Product Extra Information

Material Steel
Chain 520
Teeth 40
Color Black
Inner diameter (ID) 80
Pitch circle diameter (PCD) 104
Bolt hole 10.5
Type RFE
Product Application
ModelFrom yearTo Year
300 CL-X20202024
300 NK20202024
650 GT20202024
650 MT20202024
650 NK20202024
650 R NINJA20082024
700 CL-X Adventure20202024
700 CL-X Heritage20202024
700 CL-X Sport20202024
900 Z (ABS) (ZR900 AHF,AJF,AKF,DJF) (520 conv.)20172024
All bikes with 520 chain20042011
Carrozzeria wheels in 520 chain (80.11 mm bore, 6 bolts)00
EN650 Vulcan-S (ABS)20152024
ER 6 N (ER 6 F )20062011
ER-6 N (ER650 ECF,EDS,EEF,EFF,EGF,FGF)20122024
ER-6N (ER650)20122016
EX650 Ninja 650R20102024
EX650 Ninja 650R20062009
GPZ400 (KZ400M) (520 conv.)19831983
GPZ400 27PS19841997
GPZ400 49PS19841987
GPZ550 (Z550D1) TWIN SHOCK (520 conv.)19811981
GPZ550 (ZS550A1-A6) UNITRACK19841992
GPZ550 (ZS550H1-H2) UNITRACK (520 conv.)19821983
KLE650 FKF, FKFA Versys ABS20192024
KLE650 Versys20072018
KLZ1000 Versys (SE) (ABS LT (SE)) (520 conv.)20122024
Z 1000 (ZR 1000 A1-A3) (520 conv.)20032006
Z 1000 (ZR1000 C7F,C8F,C9F) ABS (520 conv.)20072009
Z 1000 (ZR1000 DAF,DBF,DCF,DDF,DDFA) (520 conv.)20102014
Z 1000 (ZR1000 EBF,ECF,EDF,EDFA) ABS (520 conv.)20112013
Z 1000 (ZR1000 GEFA,GFF,GGF,HHF,HJF,HKF,HLF) ABS (520 conv.)20152024
Z 1000 (ZR1000) Black Edition (520 conv.)20122012
Z 1000 (ZR1000) GEFA,GFF,GGF,HHF,HJF ABS (520 conv.)20142024
Z 1000 H2 (ZR1000 KLF-A-B) (520 conv.)20202024
Z 1000 R (ZR1000 JHF,JJF,JKF,JLF) (520 conv.)20172024
Z 1000 Special Edition (520 conv.)20132013
Z 1000 Special Edition (520 conv.)20142015
Z 1000 SX CIty / ABS / TOURER (ZR 1000 GBF, GCF) (520 conv.)20112024
Z 650 C1-C3 (520 conv.)19781979
Z 650 SR D2-D3 (520 conv.)19791980
Z 750 (ZR-750 S, Z 750 R, ABS)20042012
Z1000 (ZR1000 DAF,DBF,DCF,DDF,DDFA) ABS (520 conv.)20102014
Z500 B3 (6 SPEED) (520 conv.)19811981
Z550 C1-C3, LTD (520 conv.)19811983
Z650 (ER650 GHF) ABS20172024
Z750 B1-B4, Y1, Y2, LTD (2 CYLINDERS) (520 conv.)19781982
Z800 ADS (ZR800)20132024
Z900 ABS (ZR900 BHF,BJF,BKF) (520 conv.)20172024
Z900 RS Cafe (ZR900 CJF,CKF,CJFA,CJFB,CKF,CKFB) (520 conv.)20172024
ZR400 A1, B1 (Z400F) (520 conv.)19831985
ZR550 A1, A2 (Z550F) (520 conv.)19801983
ZX 10 R (520 conv.)20062007
ZX 10 R (520 conv.)20042005
ZX 10R NINJA (520 conv.)20062007
ZX 10R NINJA (520 conv.)20162024
ZX 10R NINJA (520 conv.)20042005
ZX 10R NINJA (520 conv.)20082010
ZX 10R NINJA (520 conv.)20112015
ZX 10RR NINJA (520 conv.)20172024
ZX-636 (A1P) (520 conv.)20022002
ZX-636 (B1-B2)20032004
ZX-636 (C1) NINJA20052006
ZX-636 Ninja (ZX-6R)20132018
ZX-6R (ZX 600 G1-G2) NINJA (520 conv.)19982002
ZX-6R (ZX636 EDF,EEF,EFF,EGF,EHF,EJF) Ninja (520 conv.)20132018
ZX-6R (ZX636 GKF) Ninja ABS20192024
ZX-6R (ZX636 HKF,ZX636 GKF,GLF) Ninja ABS20192024
ZX-6RR (ZX 600 K1 - M1) NINJA20032004
ZX-6RR (ZX 600 N1 - NF) NINJA20052006
ZX-7R (ZX 750 P1-P6) NINJA (520 conv.)19962003
ZX-7RR (ZX750 N1-N2) NINJA (520 conv.)19961999
ZX-9R (ZX900 B1-B4) NINJA (520 conv.)19941997
ZX-9R (ZX900 C1-C2, E1-E2) NINJA (520 conv.)19982001
ZX-9R (ZX900 F1-F2) Ninja (520 conv.)20022004
ZX1000 Ninja (520 conv.)20112024
ZXR400 H2, L1-L9 (ZX-4))19882001
ZXR400 R (ZX400J2)00
ZXR750 H2 (ZX) (520 conv.)19901990
ZXR750 J1, J2 (ZX) (520 conv.)19911992
ZXR750 R K1 (ZX) (520 conv.)19911992
ZXR750 R L1-L3 (ZX) (520 conv.)19931995
ZXR750 R M1-M3 (ZX) (520 conv.)19931995

Select option below to choose diffent teeth and color

Out of stock

Each order from 220PLN value of goods, indlude free shipping inside Poland. If order total is less then 220PLN, shipping cost will be calculated.


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Excl. 23% VAT and Shipping


Product Description Image

Available in colors


Check your bike model for availabe color. More color options in Custom sprocket Section

Category Description

Why Supersprox Racing Steel

  • CAD Designed and CNC Laser cut to ensure an exact fit.
  • One of the lightest all steel sprockets on the market.
  • The steel theet last 3 times longer than aluminum.
  • Developed on the race track to give longer system life and high performance.
  • Include our exlusive 2x zink for anti corrotion and black finish.
  • Special tooth design increases chain contact and significantly extends the sprocket life.


single product rating


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FAQ: Frequently asked questions

Products FAQs

Return policy

Unused items in saleable condition purchased from our eShop may be returned within 30 days of the purchase date for a credit to the card on which they were originally purchased. Returned goods will only be accepted with prior authorization. For more detailed return policy click here.

I received a damaged product

If the sprocket you purchased is damaged please make images and send to us by email and one of our representative will connect with you within 48h.


Exchange of the sprocket is possible only if the sprocket is not used and purchased from our eshop directly. Return sprocket will be fully refunded (excluding shipping) and a new order for the exchange sprocket has to be placed on our eshop.


All sprockets are guaranteed against defects in material and workmanship. Because we cannot control the application of our sprockets, buyers assume risks for any and all damage caused to themselves and others due to any failures. No warranty, expressed or implied, is made. Sprockets are designed and manufactured to be used specifically on the models listed in our catalog. Clearances must be checked before ordering different size sprockets than originally came on the machine. Chains are guaranteed in accordance with the manufacturer’s own terms of warranty. All products leave our warehouses in good condition, therefore if you receive an item that is not in good condition it should be immediately reported.

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    Shipping methods

    Each order from 220PLN value of goods, indlude free shipping inside Poland. If order total is less then 220PLN, shipping cost will be calculated.

    Gear Ratio


    Gear ratio explained. The gear ratio, is the ratio of turns made by one gear, compared to the other gear, when the gears are connected by a chain. An example of gear ratio will be with one gear of 10 teeth and the second gear of 20 teeth, giving a ratio of 2 (20/10=2). To calculate the ratio, devide the number of teeth on the rear sprocket, by the number of teeth on the front sprocket and the resulting number is your gear ratio.
    Why do you need to know your gear ratio? It might be, that your bike is not performing as you would like and a change in gear ratio might help the performace.
    GEAR DOWN. An example of this would be, that the bike is difficult to start in first gear and the clutch needs to be used more than you would like. You have plenty of top end speed, but need more slow speed control. The answer, might be to GEAR DOWN the bike. You can do this by adding more teeth to the rear sprocket or reducing the number of teeth on the front sprocket.
    GEAR UP. The opposite situation, might be that the bike has lots of power, but is reaching the rev limiter in top gear and you would like to reduce the revolutions at a particular speed. To do this, you would need to GEAR UP the bike. By reducing the number of teeth on the rear sprocket or increase the number of teeth on the front sprocket.
    Diameter of gear. Each tooth added or taken away from a sprocket, will reduce the diameter of the sprocket by a given amount. For simplicity, you can think about 5mm change on the diameter, for each additional or reduced tooth. This will help understanding in relation to space requirements for gear ratio changes.
    Chain length. The addition of teeth to the sprocket, may require a longer chain or changing the position of the rear wheel, by moving that backwards or forwards. It will depend on the addition or subtraction of sprocket teeth. This can be calculated by considering the chain pitch. For simplicity, you can think about each chain link requiring 16mm length (actually 520, 525, 530 chains require 15.875mm per link to be exact). But the chain is going around the rear sprocket and the front sprocket, so the important number would be the change in diameter of the sprocket and not the chain length. An example would be to remove one tooth from the rear sprocket. This would make the chain more loose and to correctly adjust the chain, you would need to move the rear wheel backwards (away from the small sprocket) by 5mm. This movement would compensate for the change in diameter. Due to chain construction, it is not possible to remove only one link and it is neccasary to remove even numbers of links (2, 4, 6, 8 etc).

    Product Video

    Custom Product Teeth