This product is a brand new Yamaha OEM complete 3B4/1HP servo assembly. Both part numbers are the same. See note below. If you are looking for just the servo motor to rebuild your assembly, click here. http://www.501parts.com/product-category/yamaha-servo-motors/
The complete servo assembly as shown in the picture is what you will receive. These are Yamaha factory OEM plug and play servo assemblies and are ready to install on your front differential.
Includes new O-Ring for installing on the front diff.
Note: The 3B4-4616A-02-00 and 1HP-4616A-00-00 part number servos are the exact same. Yamaha updated the part number in 2012 but the part is still the same. This product as well as most all our parts will also work with the Yamaha Clone side by side and ATV’s to include Massimo, Hisun, Benneche, Coleman, and Big Muddy.