You guys are forgetting the most important part... NEVER use a B-Pipe. They are overpriced and cant produce nearly the same power as a coffman or protec pipe.
Im interested as well. My AM reeds came with instructions that said carb needed to be retuned because the reeds would cause the motor to run rich but a friend told me no, only after pipe or F/A.
After doing plug chops, I'm still a bit rich on the low and tad lean on the high so I think his...
I like my 650 pump. It took more work but thats because I blended the pump cavity for bettet flow into the shoe. Yamanube's process is pretty easy. Like Tom said, more than one way.
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