If you are riding an M800/8000 check wth your Yamaha dealer if you are looking for parts that are shared with the Vipers. Seems that most of them are cheaper than buying from Cat.
not sure if all the parts are the same and cheaper....hood. windshield pod, gauges are diff, but I have quite a few guys using the Yamaha two stroke oil .... saves you some cash... generally we have found the cat part cheaper..... depends on your dealer I guess : )