The Renthal 131U-520-49GBSI UltraLight rear chainwheel is a CNC-machined rear sprocket made from 7075 T6 aluminum. Its lightweight aluminum construction is designed to reduce weight compared with steel while maintaining strength for powersports applications.
Computer-engineered and tested for precise fitment, concentricity, and load dispersion, this rear sprocket features tooth profiling intended to support efficient power transfer. A hardwearing surface treatment helps provide durability in demanding riding conditions. The sprocket is silver and has 49 teeth for a 520 chain.
Manufacturer part number: 131U-520-49GBSI. Vendor part number: 131U-520-49GBSI. Fitment includes 1998 Yamaha WR400F; 1998 Yamaha YZ400F; 1997 and 1998 Yamaha YZ125; 1993 Yamaha YZ125; 1997 and 1998 Yamaha YZ250; 1994 Yamaha YZ250; 1995 Yamaha YZ250; and 1996 Yamaha YZ250.
Features:
- Material: CNC-machined 7075 T6 aluminum construction
- Chain Size: Designed for a 520 chain
- Tooth Count: 49 teeth
- Finish: Silver
- Design: Computer-engineered and tested for precise fitment, concentricity, and load dispersion
- Tooth Profile: Designed to support power transfer
- Fitment: Fits select 1993-1998 Yamaha YZ125, YZ250, WR400F, and YZ400F models
Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: powersports
Epa: N/A
Carb Acknowledgement Required: false
Clearance Item: t
Regular Stock: false
Units Per Sku: 1
Fitment:
1993 Yamaha YZ125 Base
1994 Yamaha YZ125 Base
1994 Yamaha YZ250 Base
1995 Yamaha YZ125 Base
1995 Yamaha YZ250 Base
1996 Yamaha YZ125 Base
1996 Yamaha YZ250 Base
1997 Yamaha WR250 Base
1997 Yamaha YZ125 Base
1997 Yamaha YZ250 Base
1998 Yamaha WR400F Base
1998 Yamaha YZ125 Base
1998 Yamaha YZ250 Base
1998 Yamaha YZ400F Base