Upper Drive Gear
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Used on many upper crank assemblies. This 24 tooth chain drive gear is installed at the end of the upper crank assembly.
Some earlier versions of this style of lift system used a 22 tooth sprocket, part number 4730B3888. This 24 tooth gear is directly compatible, and still the same lift ratio.
Measures 7/8 inches tall, 2-7/8 inches across tooth to tooth, and has 24 teeth total.
Part number 4730C3858