Makes sense. The Ninefiddy has been run as a "big bang" engine before by inmates. Haven't heard of a Nine-Ninety doing the same.
BTW, you really need to get a spark plug socket if you're going to continue tuning your Katoom. See CJ. :p
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DISCLAIMER: All observations made in this post are mine and based solely on my own anecdotal experiences, and may contain large doses of facetiousness. YMMV, of course. You are "on your own", and I take no responsibility if someone tries anything in this post and gets into trouble with the law, damages their person or property, or goes blind. Take everything you read or hear "anywhere" butt especially on the Web with a large dose of salt.