Originally Posted by hardwaregrrl
No. I had it done per advice from the person working on the bike. Honestly, I don't notice a different. The bike never pinged to begin with, and it has not made any difference in fuel efficiency. It actually was more efficient prior to the dual/plug, and its one more thing to think about when tuning. It was a waste of money for me and kind of a pain in the ass, the bike hasn't really been the same since. No. I don't think its necessary.
It's really only necessary for high compression motors - which the ST isn't. At this point, it would probably be a good idea to increase your compression ratio to get the benefits: more power, more mpg, and even better starting when cold.