Yamaha MT09 Rear Sprocket Fitment: 2014-2019 Pitch: 525 Front Sprocket: 15 16 17 Teeth (Steel) Rear Sprocket: 39-54 Teeth ORDERING INSTRUCTIONS: Refer to the sprocket tooth counts available above. When paying write the FRONT AND REAR SPROCKET TOOTH COUNT AND COLOR in your PayPal payment notes. For example: if you want a 40 tooth blue rear sprocket write: "40 TOOTH BLUE" in the notes to seller section of your PayPal payment. Then write "17 TOOTH for the Front Sprocket", for example. You can also email us your sprocket tooth count/color information before or after check-out. Vortex Front and Rear Sprockets Fitment: Yamaha MT09 Years: 2014 2015 2016 2017 2018 2019 Pitch: 525 Front Sprocket Teeth: Available in 15-17 Teeth Rear Sprocket Teeth: Available in 43-54 Teeth Color choice for Rear Sprocket: Blue, Black or Red ORDERING INSTRUCTIONS: Refer to the sprocket tooth counts available above. When paying write the FRONT AND REAR SPROCKET TOOTH COUNT AND COLOR you want us to ship in your PayPal payment notes. For example: if you want a 40 tooth blue rear sprocket write: "40 TOOTH BLUE" in the notes to seller section of your PayPal payment. Then write "17 TOOTH for the Front Sprocket", for example. You can also email us your sprocket tooth count and color information before or after check-out. Front Sprocket Features: Vortex Steel Front Sprocket Drilled lightening holes reduce rotating mass High carbon steel for maximum strength Special Vortex Nichel plating to resist corrosion Induction hardened to reduce surface wear Precise tolerances to ensure concentricity Rear Sprocket Features: Lightweight high-performance alternative to the stock steel sprocket Considerably reduce mass and allow you to change your gearing. Made with the highest quality aluminum 7075 T6 aluminum is the best grade material for light weight and durability The weight you save on drive components is multiplied as rotating mass Less rotating weight improves acceleration CNC Machined to tightest tolerances Their unique manufacturing process creates a perfectly concentric sprocket every time This frees horsepower and extends the life of both the chain and sprocket Perfected tooth design has less drag and reduces friction for better acceleration and deceleration Attractive, Smart Design Vortex patented design offers a unique look Mud grooves and coating help keep components clean We are an authorized Vortex dealer.