Kubota KX 161-3 drive sprockets are available on sale individually at Pentom Parts. This sprocket is also known to replace the original sprocket for the Kubota U45-3, U55-4 and KX 057-4 mini excavators.
This is the replacement aftermarket drive sprocket for the Kubota KX 161-3 mini excavator. The diameter of the sprocket from tooth tip to tooth tip is 16 7/8 inches (new). There are nine mounting bolt holes, and nineteen drive teeth. The center drive motor mounting hole is nine inches in diameter. The base of the tooth is the widest part of the sprocket 1 11/16 inches. We always encourage users to change drive sprockets at the same time they change their rubber tracks to maximize the lifespan of the parts and reduce any premature wear of either part. If you double check your measurements this sprocket is likely your replacement for Kubota U45-3, U55-4 and KX057-4. Double check the measurements prior to ordering.
These Kubota KX161-3 undercarriage parts are also available bundled in combo packages for additional savings and convenience: