This blog post has some good pictures of sparkplugs in both the lean, stoich, and rich colors
Click Here
Click Here
This blog post has some good pictures of sparkplugs in both the lean, stoich, and rich colors
Click Here
I had the same problem with the pods, I cut a window on the internal lip large enough to leave the diaphgram port free to breath and then resealed everything with some glue.
I have two huge, open exhausts and I'm using #165 main jets.
The color of the plug is perfect. Going from cold weather to "hot" (in UK it's never really hot) I only had to adjust the air mixture screws.