I'm finding that the only way to sell bikes for a profit is to build custom bikes for people, and only build them the way the customer wants. I wait for someone to call me from my craigslist ad, and then if they want a chinese 2 stroke, I can do that, but if they want a 212 predator, I can do that too. Upgrade the carburetor? We can do that. Custom exhaust pipe? Let me grab my welding torch. You get the idea.