Thanks everyone, this is exactly what I wanted to hear, success with the stock pipe. I'll keep working on mine a little. I think the 11-7 that I ran with the tuned pipe is too much for the stock pipe.

Anyone else want to tell us about your YS 45 stock pipe set up?

This is a nice powerful engine, it pulled my ultrastick vertical forever, even with the stock pipe.

Thanks,
WOOD