It is not known which company manufactured the reduction drive in the Koyker Raptor KUV 4214 because that part is obsolete and no longer made.
42" long and 5/8 wide.
You can obtain a manual for the Koyker Raptor 4000H by visiting the official Koyker Manufacturing website, where they often provide downloadable manuals for their products. Additionally, you can contact their customer support directly for assistance or check with authorized dealers who may have printed copies available. Online forums or agricultural equipment websites might also have user-shared manuals.