For MB200 Includes chain tensioner Sprocket not included The jackshaft assembly for the Baja Mini Bike MB200 is for the MB200 version of Baja mini bike only This item is NOT compatible with the Baja Mini Bike MB165 model. The jackshaft assembly for the Baja Mini Bike MB200 is for the MB200 version of Baja mini bike only. This item is NOT compatible with the Baja Mini Bike MB165 model.,8 It says this product is for newer models. Is the Baja mb200 from 2014 new enough Yes, this will work on all models of the MB200. The verbiage is a bit unclear but we are working on updating this information. The MB200 is the newer version of the MB165. Therefore this will work on your MB200. We apologize for any confusion. 2 Does this jackshaft come with bearings Yes, this jackshaft does include pre-installed bearings. 1 Does this product come with