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[stanyx]

Found a NOS Zippers 50mm Thundermax TB assembly. Good results, see dyno

[Twolanerider]

So for either HP or torque no improvement until 3500 or after with both slightly less until 3250 with the new throttle body?  How much time you spend riding above 3500?

[Twolanerider]

Seeing this again brings up the same question from your other thread sharing this:


https://www.cvoharley.com/smf/index.php?topic=121232.msg1513373#msg1513373


Does the gain come in the RPM ranges you regularly ride the bike?  If so you're likely enjoying the difference so congrats on having it done.  The improvement is a little late in the curve for the way I most commonly ride but it's not my bike so that doesn't matter at all.

[stanyx]

Correct about the usefulness of the extra HP & TQ, I also mostly stay in the 2500-3500 rpm range, but it’s for those times I want to WOT. If you look at the original cam, which I changed to to a RS 575, it only came on at 6000+ rpm, so it’s a bit a back to the roots,