This site has already tremendously helped! I really appreciate all the feedback.

Even though this is my first bike, I already have big respect for Honda. I'm doing my research (I read the bike history on the site too) and am starting to realize what a gem I managed to get. I want to keep this bike as true to itself as possible. After Hobbit210's post, I ordered Honda coils, they should arrive Monday.

I wish I spoke Japanese, and the moto-shops around here will only look-up parts according to make/model. Unfortunately it is my understanding (Japanese people are extremely helpful people and sometimes understand bits of English) that Honda has discontinued making coils for M16 specific.

You're absolutely right. I'm determined to find as much as I can while I'm here. It's also nice to find a wonderful group of enthusiasts who can help me learn.