Thanks a bunch George! I like the poor mans exhaust analyzer, it fits my budget. Since I got it running, I had noticed that upon starting I could just go down the road with it. I never needed to let it warm up, it just ran fine with no hesitation. I figured that it was a testament to my great carb rebuild and adjustments..or so I thought. I'm interested to see how it starts and runs once I change out that main jet. I'll keep ya posted.