Tuner
Seasoned HDF Member
Joined: Sep 2017
Posts: 12,233
Likes: 4,943
From: England
The wording is drive train warranty I believe. If something else were to go wrong then that will be covered.
I have a feeling those that get their bikes tuned are doing so after warranty has finished or have no intention of ever seeing the dealer again after purchase.
I have a feeling those that get their bikes tuned are doing so after warranty has finished or have no intention of ever seeing the dealer again after purchase.
Road Master
Joined: May 2005
Posts: 1,096
Likes: 418
From: Pennsylvania
Better question to ask your dealer though.
Originally Posted by Andy from Sandy
I have a feeling those that get their bikes tuned are doing so after warranty has finished or have no intention of ever seeing the dealer again after purchase.
I installed a PV4 tuner, RS528 cam, intake, exhaust, clutch, comp ramp, oil pump, cam plate, lifters, pushrods, handlebars, and all kinds of other stuff all by myself at home within a couple weeks of buying my bike new.
I knew going in that my warranty wasnt likely to survive but I knew what I wanted for the bike and wasn't about to wait 2 years for it. I'm not getting any younger
Last edited by chunks; Nov 9, 2025 at 09:53 AM.
Cruiser
Joined: Oct 2025
Posts: 170
Likes: 70
From: US
But did your bike fail
My understanding is that they cant void your warranty unless its an issue specifically related to your mod. Meaning if you install a tuner, and your rear brake master cylinder blows up, it would still be covered.
Better question to ask your dealer though.
Not necessarily
I installed a PV4 tuner, RS528 cam, intake, exhaust, clutch, comp ramp, oil pump, cam plate, lifters, pushrods, handlebars, and all kinds of other stuff all by myself at home within a couple weeks of buying my bike new.
I knew going in that my warranty wasnt likely to survive but I knew what I wanted for the bike and wasn't about to wait 2 years for it. I'm not getting any younger
Better question to ask your dealer though.
Not necessarily
I installed a PV4 tuner, RS528 cam, intake, exhaust, clutch, comp ramp, oil pump, cam plate, lifters, pushrods, handlebars, and all kinds of other stuff all by myself at home within a couple weeks of buying my bike new.
I knew going in that my warranty wasnt likely to survive but I knew what I wanted for the bike and wasn't about to wait 2 years for it. I'm not getting any younger
Last edited by Funnel; Nov 9, 2025 at 10:56 AM.
Grand HDF Member
Joined: Nov 2017
Posts: 4,251
Likes: 3,132
From: Texas
It's simple, and is spelled out clearly in the manual: use a non-EPA tuner and Harley will no longer provide warranty service on any of the powertrain components.
Use a tuner and your radio **** breaks? Harley will repair it under warranty.
Use a tuner and your piston comes blasting out of the cylinder? No warranty coverage.
Bought a $4,000 extended warranty, then used a tuner, and a piston rod breaks? No warranty on any powertrain components, during the factory period or during your extended warranty.
And before anyone gets their panties in a bunch about Magnuson Moss, Magnuson Moss is about the right to repair. Not the right to violate federal law (the Clean Air Act) with impunity. Replacement parts = ok. Hop-up parts = no warranty and maybe a fine.
Use a tuner and your radio **** breaks? Harley will repair it under warranty.
Use a tuner and your piston comes blasting out of the cylinder? No warranty coverage.
Bought a $4,000 extended warranty, then used a tuner, and a piston rod breaks? No warranty on any powertrain components, during the factory period or during your extended warranty.
And before anyone gets their panties in a bunch about Magnuson Moss, Magnuson Moss is about the right to repair. Not the right to violate federal law (the Clean Air Act) with impunity. Replacement parts = ok. Hop-up parts = no warranty and maybe a fine.
Stellar HDF Member
Joined: Apr 2016
Posts: 3,315
Likes: 2,110
From: Masshole
If you tune it and have to bring it in to the dealer for anything, they plug in a digital technician, it will automatically flag the bike as having the CPU altered. Now to avoid all that nonsense, get a ThunderMax, they'll never know about it, just need to swap the stock ECU back in when you bring it in for service.
Stellar HDF Member
Joined: Jan 2017
Posts: 2,673
Likes: 2,077
From: Massachusetts
If you tune it and have to bring it in to the dealer for anything, they plug in a digital technician, it will automatically flag the bike as having the CPU altered. Now to avoid all that nonsense, get a ThunderMax, they'll never know about it, just need to swap the stock ECU back in when you bring it in for service.
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Cruiser
Joined: Oct 2025
Posts: 170
Likes: 70
From: US
Me figures
If youre able to not only buy a 35k plus Harley MFn Davidson but break into the engine immediately, I figure if the MFr blows up, and I personally have yet to see one amongst the folks I ride with, but someone will chime in about their sisters former boyfriend who has a cousin that knows someone, you have the money to fix it and shouldnt care less about a warranty. Its why I have 45k plus on my RGS, I did what I wanted and knew the what if scenarios and its internally stock. 114 M8. Ive added what I call jewelry but if youre worried about the warranty, just ride it.
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Road Master
Joined: May 2005
Posts: 1,096
Likes: 418
From: Pennsylvania
if you try to make a warranty claim on something that's related to the mods you did. Its definitely not an old wives tale. Been told to me directly by multiple dealers over the years
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