I bought a 2000 Blaster off of a kid from Craigslist. He fully disclosed that the quad needed a header for it to run properly. My question to all of you is, would the header cause the quad to not start? It started when I was at his house looking at it before I bought it, and he kicked it and it fired right up. Now it wont start. Would this be due to the lack of back pressure on the engine?