Renthal 428-47P 121U-428-47GPBK Rear Sprocket for Suzuki RM80 and Yamaha YZ80

Renthal UltraLight Rear Chainwheels are CNC machined from 7075 T6 aluminum to extremely tight tolerances, 66% lighter than steel. Computer engineered and tested to ensure a precise fitment, concentricity and load dispersion with tooth profiling to provide maximum power transfer. A combination of high strength base material, cutting edge manufacturing methods and exceptional hardwearing surface treatments its clear to see why Renthal's light weight all aluminum rear sprockets can be found on the rear wheels of many factory race team machines.

The Renthal 121U-428-47GPBK UltraLight rear chainwheel is a CNC-machined aluminum sprocket designed for powersports applications. It is manufactured from 7075 T6 aluminum and is engineered for precise fitment, concentricity, and load dispersion. The sprocket features a grooved black finish and a 428 chain size with 47 teeth.

Computer engineering and testing support the sprocket’s tooth profile, which is designed to provide efficient power transfer. Renthal states that its UltraLight rear chainwheels are 66% lighter than steel, while the high-strength base material, manufacturing methods, and hardwearing surface treatment are intended for demanding use.

This rear sprocket fits 1993–2001 Yamaha YZ80 models and the 1989 Suzuki RM80. Manufacturer part number: 121U-428-47GPBK. Vendor part number: 121U-428-47GPBK.

Features:

• Material: CNC-machined 7075 T6 aluminum construction
• Chain Size: 428
• Tooth Count: 47 teeth
• Finish: Black grooved surface
• Design: Engineered for precise fitment, concentricity, and load dispersion
• Power Transfer: Tooth profiling designed to support efficient power transfer
• Weight: Renthal states the UltraLight design is 66% lighter than steel
• Fitment: 1993–2001 Yamaha YZ80 and 1989 Suzuki RM80

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
Regular Stock: false
Units Per Sku: 1
Fitment:
1989 Suzuki RM80 Base
1990 Suzuki RM80 Base
1991 Suzuki RM80 Base
1992 Suzuki RM80 Base
1993 Suzuki RM80 Base
1993 Yamaha YZ80 Base
1994 Suzuki RM80 Base
1994 Yamaha YZ80 Base
1995 Suzuki RM80 Base
1995 Yamaha YZ80 Base
1996 Suzuki RM80 Base
1996 Yamaha YZ80 Base
1997 Suzuki RM80 Base
1997 Yamaha YZ80 Base
1998 Suzuki RM80 Base
1998 Yamaha YZ80 Base
1999 Suzuki RM80 Base
1999 Yamaha YZ80 Base
2000 Suzuki RM80 Base
2000 Yamaha YZ80 Base
2001 Suzuki RM80 Base
2001 Yamaha YZ80 Base
2002 Suzuki RM85 Base
2002 Yamaha YZ85 Base
2003 Suzuki RM85 Base
2003 Suzuki RM85L Base
2003 Yamaha YZ85 Base
2004 Suzuki RM85 Base
2004 Suzuki RM85L Base
2004 Yamaha YZ85 Base
2005 Suzuki RM85 Base
2005 Suzuki RM85L Base
2005 Yamaha YZ85 Base
2006 Suzuki RM85 Base
2006 Suzuki RM85L Base
2006 Yamaha YZ85 Base
2007 Suzuki RM85 Base
2007 Suzuki RM85L Base
2007 Yamaha YZ85 Base
2008 Suzuki RM85 Base
2008 Suzuki RM85L Base
2008 Yamaha YZ85 Base
2009 Suzuki RM85 Base
2009 Yamaha YZ85 Base
2010 Yamaha YZ85 Base
2011 Yamaha YZ85 Base
2012 Suzuki RM85 Base
2012 Suzuki RM85L Base
2012 Yamaha YZ85 Base
2013 Yamaha YZ85 Base
2014 Yamaha YZ85 Base
2015 Suzuki RM85 Base
2015 Yamaha YZ85 Base
2016 Suzuki RM85 Base
2016 Yamaha YZ85 Base
2017 Suzuki RM85 Base
2017 Yamaha YZ85 Base
2018 Suzuki RM85 Base
2018 Yamaha YZ85 Base
2019 Suzuki RM85 Base
2019 Yamaha YZ85 Base
2020 Suzuki RM85 Base
2020 Yamaha YZ85 Base
2021 Suzuki RM85 Base
2021 Yamaha YZ85 Base