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  1. Thundermax - Harley Davidson Forums

    Oct 25, 2007 · Thundermax installation and tuning guide I promised to do some screen shots of the tuning screens, but found that this doc has everything in it. Here is a link to the pdf doc, the …

  2. Thunder max and dyno tuning - Harley Davidson Forums

    Nov 10, 2018 · The Thundermax is an excellent on-the-fly tuner that adjusts automatically. You might be able to dyno tune and get a little more out of it but I doubt that’s worth the money …

  3. Thundermax Tuning Help: 131" | V-Twin Forum

    May 4, 2020 · Thundermax Tuning Help: 131" Jump to Latest 4.7K views 5 replies 5 participants last post by ANGRYRANGER15 Oct 17, 2025 D

  4. Thundermax tuners / users hep - Harley Davidson Forums

    Apr 29, 2023 · Thundermax tuners / users hep thundermax tuner Jump to Latest 11K views 12 replies 6 participants last post by alejoBigCampleto May 1, 2025

  5. No Start, No fuel pump | Page 2 | Harley Davidson Forums

    Jun 7, 2009 · Thundermax is a replacement for the stock ECU, and learns on it's own. The ECU is unplugged and is replugged into the Thundermax unit. The "Level sensor" is the "Bank Angle …

  6. Any advantage of installing Thundermax tuner? - V-Twin Forum

    Dec 12, 2020 · As I dropped my Bike off for the 131" upgrade, I have discussed tuning/tuners with my mechanic. He said that he will use the original Harley tuner, that there is no advantage of …

  7. Thundermax Problem - V-Twin Forum

    Jun 15, 2011 · Installed thundermax with auto tune, went through all the steps and all seemed fine until the starting process. starter switch won't do a thing, I noticed the alarm light is not …

  8. 121 VVT - V-Twin Forum

    Oct 20, 2024 · It has been a few years on this site. I purchased 121 VVT. Love the bike, but falls off way too soon. Any rumors out there of tuner options? I will not use the Thundermax. Heard …

  9. M8 Engine's Stage 1 & 2 Basic Info for Newbies - Harley Davidson …

    Apr 10, 2025 · We recommend the ThunderMax EFI System for all of our engine kits and builds. ThunderMax Tuner $1088.95 – we will preprogram the system for your combination so there …

  10. Thunder max vs power vision | Harley Davidson Forums

    Jun 29, 2014 · Which is better the thundermax or power vision both with auto tune or something different all together? The difference in price is enough to cover half of the air intake I want. I'd …