Need advice...Safe to ride with Fuel Moto canned tune for 124” big bore while waiting a month for dyno tune?
Thread Starter
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6th Gear
Joined: Jun 2026
Posts: 11
Likes: 9
From: Sarasota, FL
Need advice...Safe to ride with Fuel Moto canned tune for 124” big bore while waiting a month for dyno tune?
I’ll be taking my ’17 SGS on Monday for a Fuel Moto 124” Big Bore Kit + Wood 22XE cam, high flow oil pump, header, Intake, and Cam Plate w/ Power Vision 3 tuner, which includes a canned tune set up by FM to match the new configuration (FM took a few days to produce the tune after ordering, so it looks like they did a one-off to order), adding to existing Harley SE Ventilator air cleaner and Rinehart slip-ons (Stage 1 was dyno tuned by HD dealer when I got the bike in ‘17).
I’ve heard great things about the tuner (Those Dyno Guys), but based on the website scheduler, they don’t have any openings for another month (and I haven’t been able to get them on the phone or get a response to this question through website “Contact Us” or text message). I’ve heard FM gets close with their tunes, but that it still doesn’t compare to a Dyno Tune.
So here are a couple questions I hope those with more knowledge/experience can help with… 1) Is it safe to ride the bike on an FM canned tune for a month? 2) If not safe and I don’t want to let my bike sit for a month waiting to trailer it up to Those Dyno Guys, would a Power Vision Target Tune w O2 sensors ensure engine preservation, even if I ultimately need to get it dyno tuned for better fuel efficiency and performance?
I’ve heard great things about the tuner (Those Dyno Guys), but based on the website scheduler, they don’t have any openings for another month (and I haven’t been able to get them on the phone or get a response to this question through website “Contact Us” or text message). I’ve heard FM gets close with their tunes, but that it still doesn’t compare to a Dyno Tune.
So here are a couple questions I hope those with more knowledge/experience can help with… 1) Is it safe to ride the bike on an FM canned tune for a month? 2) If not safe and I don’t want to let my bike sit for a month waiting to trailer it up to Those Dyno Guys, would a Power Vision Target Tune w O2 sensors ensure engine preservation, even if I ultimately need to get it dyno tuned for better fuel efficiency and performance?
Club Member
Joined: Apr 2016
Posts: 11,673
Likes: 8,490
From: Inland NW
I can speak to what I did with my 128.
After I completed the engine assembly, and installed the tune that Jamie sent me, I ran it, performed the heat cycles, and did some short-ish rides, and sent Jamie the log files. He tweaked it once, and I dumped the new tune in.
My plan was to ride the 1800+ miles to Wisconsin, and have Jamie dyno tune the bike, 2 months later. This was part of a longer 3 week excursion.
I rode it to work and back a half dozen times, pulled the tank, pulled the plugs and borescoped both cylinders. Looked perfect. Put in new plugs and rode it to Wisconsin without issue.
The dyno tune pulled it all together. I love it.
I AM NOT SAYING YOU SHOULD DO THIS. This is just my story, and you should just check with Fuel Moto.
After I completed the engine assembly, and installed the tune that Jamie sent me, I ran it, performed the heat cycles, and did some short-ish rides, and sent Jamie the log files. He tweaked it once, and I dumped the new tune in.
My plan was to ride the 1800+ miles to Wisconsin, and have Jamie dyno tune the bike, 2 months later. This was part of a longer 3 week excursion.
I rode it to work and back a half dozen times, pulled the tank, pulled the plugs and borescoped both cylinders. Looked perfect. Put in new plugs and rode it to Wisconsin without issue.
The dyno tune pulled it all together. I love it.
I AM NOT SAYING YOU SHOULD DO THIS. This is just my story, and you should just check with Fuel Moto.
Last edited by NorthWestern; Jun 19, 2026 at 02:55 PM.
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,253
Likes: 11,374
From: San Diego, CA
I’ll be taking my ’17 SGS on Monday for a Fuel Moto 124” Big Bore Kit + Wood 22XE cam, high flow oil pump, header, Intake, and Cam Plate w/ Power Vision 3 tuner, which includes a canned tune set up by FM to match the new configuration (FM took a few days to produce the tune after ordering, so it looks like they did a one-off to order), adding to existing Harley SE Ventilator air cleaner and Rinehart slip-ons (Stage 1 was dyno tuned by HD dealer when I got the bike in ‘17).
I’ve heard great things about the tuner (Those Dyno Guys), but based on the website scheduler, they don’t have any openings for another month (and I haven’t been able to get them on the phone or get a response to this question through website “Contact Us” or text message). I’ve heard FM gets close with their tunes, but that it still doesn’t compare to a Dyno Tune.
So here are a couple questions I hope those with more knowledge/experience can help with… 1) Is it safe to ride the bike on an FM canned tune for a month? 2) If not safe and I don’t want to let my bike sit for a month waiting to trailer it up to Those Dyno Guys, would a Power Vision Target Tune w O2 sensors ensure engine preservation, even if I ultimately need to get it dyno tuned for better fuel efficiency and performance?
I’ve heard great things about the tuner (Those Dyno Guys), but based on the website scheduler, they don’t have any openings for another month (and I haven’t been able to get them on the phone or get a response to this question through website “Contact Us” or text message). I’ve heard FM gets close with their tunes, but that it still doesn’t compare to a Dyno Tune.
So here are a couple questions I hope those with more knowledge/experience can help with… 1) Is it safe to ride the bike on an FM canned tune for a month? 2) If not safe and I don’t want to let my bike sit for a month waiting to trailer it up to Those Dyno Guys, would a Power Vision Target Tune w O2 sensors ensure engine preservation, even if I ultimately need to get it dyno tuned for better fuel efficiency and performance?
Yes, I would trust a FuelMoto canned tune. I have their FM Street Outlaw (124" S&S crate engine) installed in my bike and dyno tuned by Jaime. He has tuned many 124" combos. I would not hesitate to use a canned tune FM sent you for one of their packages. I suspect it would be good to run as a final tune on a street driven bike, but I agree that anything over bolt-in cam should be dyno tuned...
FuelMoto tune note: I have also used several FM canned tunes for everything from OEM improved, to bolt-in cam configurations. After flashing the tunes, I have run auto tune sessions with both the Basic AT, and I also have a Pro AT module (uses wide band O2 sensors) for Pro AT sessions. Rarely do I need two AT sessions. I have run a couple with the AT Pro, got aggressive with the tune MAP areas I tried to hit, and only had a cells learned average of 1%.... That's a pretty good canned tune.
The Target tune uses wide band O2 sensors, and allows for a complete Closed Loop tune MAP.... but it will just use the sensors to keep the tune AFR matched with the AFR in the tune that is in ECM over varying conditions and loads.
Unless that ECM tune MAP is specific for your engine mods, it won't help you. Your 124" kit will undoubtedly need both AFR changes and timing changes from any previous MAP you have run.
If the ECM tune MAP is for your mods, from a good tune shop (like the FM tune you got) unless you are riding it like you stole it, IMHO, I see no advantage to the Target Tune. You'll be fine until the dyno session.
Good luck with your mods....
Last edited by hattitude; Jun 19, 2026 at 03:08 PM.
Thread Starter
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6th Gear
Joined: Jun 2026
Posts: 11
Likes: 9
From: Sarasota, FL
@NorthWestern and @hattitude Thanks so much for the very helpful insight, and for sharing your experiences with scenarios that have a lot in common with my own!
Road Warrior
Joined: Aug 2014
Posts: 1,958
Likes: 406
From: NJ
I don’t have any experience with them. I’ve heard good things. Rule of thumb for me is that you eventually obviously want to get a Dyno tune specific to your set up. but a canned tune will be just fine as long as you’re not running it to the ragged edge which I would hope you wouldn’t being it’s a new build. You’ll probably have a break-in period. if you’re just riding around for breaking and riding fairly sane, I would have zero issues with running a canned tune.
Club Member
Joined: Apr 2016
Posts: 11,673
Likes: 8,490
From: Inland NW
FuelMoto tune note: I have also used several FM canned tunes for everything from OEM improved, to bolt-in cam configurations. After flashing the tunes, I have run auto tune sessions with both the Basic AT, and I also have a Pro AT module (uses wide band O2 sensors) for Pro AT sessions. Rarely do I need two AT sessions. I have run a couple with the AT Pro, got aggressive with the tune MAP areas I tried to hit, and only had a cells learned average of 1%.... That's a pretty good canned tune.
Good luck with your mods....
) , and the logs I sent back to Jamie were after 3 AT sessions. As you noted, not much change in AFR after the first one (at temp, 20 mile run)Trending Topics
Club Member
Joined: Dec 2014
Posts: 10,737
Likes: 3,756
From: SWFL
Does your pipe have wideband o2 sensor bungs? If so, I can offer my wideband power vision auto tune kit which after a couple 20 min runs will get you close enough to run forever. I used it after installing my FM kit with their base tune for my parts. I had a bad experience with Tampa dyno tuners on a previous bike, so I decided to stick with my own work. After several auto tune runs I made a logging run which Jamie reviewed and said it was pretty close, Prob not the best, but very safe and plenty of fun for me… So I never dyno’d and have been having a blast. Well, as much as the flat, straight miserable roads around here allow…
I’m in the southern most end of Sarasota County so let me know if you want to give it a try.
I’m in the southern most end of Sarasota County so let me know if you want to give it a try.
Last edited by Mchad; Yesterday at 07:58 AM.
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From: SWFL
Probably true, but after spending the time and money building my top end I was pretty paranoid about it being even the slightest bit lean for the break in miles. But even a couple narrow band auto tunes would be ok. The only problem with narrow band auto tunes is it really leans out the tune to keep it in the “narrow” range of the stock o2’s. So you really don’t want to push it beyond very mild riding during the runs. The wideband kit doesn’t lean the tune out so you’re safer to “get on it” to get those higher rpm/higher throttle cells.