JT SPROCKETS Rear Sprocket - 31 Tooth - Z 125 Pro JTR801.31

If you're running a Z 125 Pro, rear sprocket wear directly impacts acceleration response and top-end performance. A worn sprocket creates slack in your chain drive, robbing you of power transfer efficiency and creating costly wear on your entire drivetrain. JT's 31-tooth rear sprocket restores that precision engagement and gives you the durability to handle repeated hard launches without premature degradation.

JT Sprockets engineered this component using C45 high-carbon steel—the same material trusted across professional racing applications. The heat-treatment and bead-blasting process reduces surface tension, extending tooth life and minimizing chain wear. You're getting competition-grade reliability at a price that doesn't require a rebuild budget.

• 31-tooth configuration
• Z 125 Pro specific fitment
• C45 high-carbon steel
• Heat-treated construction
• Bead-blasted finish
• Bolt-on installation
• Industry-standard quality
• MPN: JTR801.31