The specific part needed for this model may vary according to the machine? S serial number. John Deere Gator RSX 850i Sport 12 Crankshaft MIA12303 48369. Business address must have a loading dock or a fork lift to unload product from the trailer. The business address must be in a business district. After 30 days all sales are considered final. All parts (except those below) have a 30-day guarantee. 180 days (6 months). 90 days (3 months). Bearings, bushings, gaskets, seals, cables, petcocks, clutch plates, sprockets, pistons and rings are all wear items and are not guaranteed by us unless stated specifically that they are good in the listing. Also, all parts are used unless otherwise noted in the listing description. We live by our slogan, Parts Done Right. We believe in honest and fair deals. We stand behind our products. Power Sports Nation offers quality used parts at discount prices. We are a fully licensed and bonded power sports dealer in Nebraska, USA. Our used parts are inspected, cataloged online, and stored indoors within our warehouse. As individuals we are also big enthusiasts of quad sports. We race and we ride! 84786 N HWY 81 Norfolk, NE 68701. Message responses may be delayed over the weekend.