I'm coming into this a little late, so I apologize if this isn't helpful. The 350 Big Bear I recently pulled out of a fence row had been minus a carburetor, so I bought one of ebay for about 40. It was an aftermarket carb, not a Yamaha carb. But it cranked right up and ran as soon as I figured out how everything went together. The previous owner said she drove it where it was parked, so I think someone "borrowed" the carb, along with the manifold, and they cut the throttle cable. So I had to replace all of those, plus the owner lost the key so I replaced the key switch. And of course a battery. It runs great to me, and all of these parts were aftermarket bought off ebay or Amazon.
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