Here is more info for you guys to digest. These runs were all made on my bike. This is a "Standard Duner" Hall ported big reed top end, Hall modded stock head, V2 reeds, and Hall 41.5 mikuni carb with K&N filter setup. The motor is built for above average performance with good life and reliability. This package is what the majority of his customers buy and that is why it was chosen for testing. My girlfriend likes it alot.
The runs were done in groups making 4 pulls with each pipe. I selected the 3rd run of each group to compare, so as not to be looking at hot vs cold runs.. it does make a difference.
This wasn't an optimum engine/pipe max HP contest, but we could do that another time.
Enjoy.
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