Probably your best bet for Just the 200w stator and sh522 (waverunners, atc200, probably more) rectifier. You'll still have to float the ground, and come up with a mounting and battery solution. As well as do some wiring. https://www.rmstator.com/en_ww/products/kit-stator-200-w-regulator-rectifier-yamaha-yfz-350-banshee-1995-2006-rm22955
Or buy a plug and play solution. It comes with wiring, battery, and mounting from https://www.jdscustoms.com/product/jl-engineering-complete-dc-conversion-kit/ Just select to add a new stator, It'll be a 200w and they will float it for you.