i bought this as a project and it has me stumped, it idles fine but you give it throttle it stalls out, thought it might be carb but replaced that,does anyone have a free manual download for the 4x2 big bear? not sure of year, also wheres the vin number i looked everywhere

 

VIN numbes are on the bottom frame tube somewhere between the lower wishbone mounting and your left foot, but are usually only readable for a few months after the bike is sold, and disappears altogether after a couple of years. This website Yamaha Servo Replacement Motors ? 501 Parts.com Yamaha 4wd System Parts and Repair has a few Yam manuals, don't know if yours is one of them, Please note that there were lots of different 350 Big Bears made, so you need to find the years your model was made, to find the right manual.