1999-2022 for Yamaha YZ125 Rear Sprocket Chromoly Stl/Zir 49T-520 Chromatic Yam Title: Back Rest

Title: Back Rest

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1999-2022 for Yamaha YZ125 Rear Sprocket Chromoly Stl/Zir 49T-520 Chromatic Yam Title: Back RestManufacturer: DIRT TRICKS MPN: YZ 49 Z C Title: Lightweight Rear Steel Sprocket Size: 49 Option: Color: Chromatic The Dirt Tricks Rear Sprocket was designed and patented by Dirt Tricks president and engineer Greg Burns in 2002, using his knowledge of aerospace steels, heat treatments, as well as FEA stress analysis His goal was to create a sprocket that would last an entire season of hard riding, yet be comparable in weight to aluminum, the end result