MK1003159 Drive Sprocket Set Front & Rear Product Info:

• Pitch 520
• Kit includes 1 Front 11 tooth drive sprocket, and 1 Rear 42 tooth drive sprocket; Sprocket Material consists of SAE 1023 structural carbon steel
• Hub Inner Diameter 21.7mm; Hub 2 (ID) 25mm; Hub Inner Diameter 100mm; Mounting Hole (ID) 8.5mm; Distance Between Mounting Holes (ID) 116mm

Included in This Kit:

(QTY 1) NICHE 519-CDS2323P Tooth Front Drive Sprocket

Substitute For OEM Part Numbers(s): 3221049, 3221043

(QTY 1) NICHE 519-CDS2439P Rear Drive Sprocket

Substitute For OEM Part Numbers(s):

Compatible with the Following Vehicles:

Polaris Trail Boss 250 2X4: 1990-1992
Polaris Trail Boss 250: 1987-1992
Polaris Trail Boss 250R: 1987



WARNING: This product can expose you to chemicals including lead and phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov