Why can't you talk about jetting?
Well, you can but you cannot state specific jets sizes, because someone threatened court action when their motor went pop as a result of following jetting advice.

I will amend the rules to point this out, there is a setup section in the members area where you may discuss jetting.

Why can't you mention "that" auciton site?
Because of the amount they charge in fees to sellers.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread