When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
So far I have the SE tuner, SPC big bore exhaust and the SE heavy breather. with warranty up in the next year I am thinking just "go ahead and do a cam". There seems to be quite a number of cams out there and I have little knowledge on HD cams. what I would like to do this spring is start to collect parts. Cam, maybe a different tuner/ECU (dynojet, tmax etc) , but im wondering if the SE products are the simplest bet (get the Wideband kit for the SE pro I have now, or go aftermarket), and another upgrades "while im in there" oil pump kit blah blah blah...... I am not chasing hight numbers, just more of a "potato potato" cam, and a good tune/cam for the back roads we have here in the PNW......
what is a good cam with a matching tune? is the high flow HD pump worth it?
So far I have the SE tuner, SPC big bore exhaust and the SE heavy breather. with warranty up in the next year I am thinking just "go ahead and do a cam".
Your powertrain warranty is already over as you removed the catalytic converter from the bike with the SPC Exhaust.
From the owners manual:
"The use of non-Harley-Davidson replacement parts does not invalidate the existing warranty, if any, on other Harley-Davidson components unless the non-Harley-Davidson parts cause damage to warranted parts or result in the creation of an emissions non-compliant motorcycle.
Actually the Harley SE cams are not bad, You could get one, and the SE lifters, use the SE Tuner install the correct Stage II Tune, then do some record runs for the fine tuning and you'll be just fine. Hulkss is correct that once you changed the exhaust to a non- EPA compliant system, your engine warranty was gone.
I had a 24 RG with SEPST, SMart TunePro Widebands, SE 511 cam, Khromwerks 2 into 1 & the SE Wedge air cleaner. I thought it was great. As Hulkss posted above and SteveCole told me at the time, my warranty was actually voided with that exhaust.
I now have a 25 SGU with a Thundermax, CycleRama 484 Magnum cam, Khromeworks 2 into 1 & a Trask air cleaner and it blows away any Screaming Eagle setup that I had before. Like NIGHT & DAY difference. I wasn’t a numbers guy either, but I fear I’m slipping down that slope. The bike runs incredible, sounds great (to me) & can hold it’s own for any sudden, quick bursts (in Mexico, on closed roads using AI).
I think with your non compliant exhaust it might only affect your powertrain warranty if it was still installed when you had the bike inspected and filed a claim, so you could swap it back to the OEM if you had the opportunity. Also, let's say you have a primary or transmission failure, it would seem they would have to be able to attribute the exhaust to the failure which doesn't seem likely, so wouldn't affect your powertrain warranty. Of course HD could and possibly would try to avoid honoring the warranty if there are any obvious violations. If you have a good relationship with a dealership service dept they may be willing to try and help circumvent that scenario from playing out. Stepping outside their terms and conditions usually comes down to if you feel lucky or not..so, do you?
After 20 some years working in warranty operations for a large auto manufacturer (that also makes motorcycles), voiding a warranty typically only happens when you use the product for non-specified activities...this would include racing, for-hire, a salvage vehicle, etc. This is all laid out in the Magnuson-Moss Warranty Act from the mid-1970s. Use of aftermarket performance or service parts and doing your own service do not void the warranty, unless those parts or installation cause the problem in question. For example, if your aftermarket oil filter came apart and trashed the engine, that would not be a factory warranty issue as Harley had no control over that. That said, changing emissions-related components like the cat convertor or cams would void the emissions warranty as the MoCo could no longer guarantee that the bike was emission compliant. Harley lost a multi-million dollar lawsuit a few years back regarding providing the means to make their products operate out of emissions certifcation/compliance, so they are very sensitive to this! But if something like a stator failed for example, that would still be covered by your regular factory warranty even with the cat convertor removal as it's not an emissions compliance issue. Dealers often mis-quote warranty terms but you can usually get clarity from calling the factory direct. And the local laws like CARB in CA can cause other complications for emissions related stuff.
Last edited by mikes84790; Feb 2, 2026 at 07:49 AM.
After 20 some years working in warranty operations for a large auto manufacturer (that also makes motorcycles), voiding a warranty typically only happens when you use the product for non-specified activities...this would include racing, for-hire, a salvage vehicle, etc. This is all laid out in the Magnuson-Moss Warranty Act from the mid-1970s. Use of aftermarket performance or service parts and doing your own service do not void the warranty, unless those parts or installation cause the problem in question. For example, if your aftermarket oil filter came apart and trashed the engine, that would not be a factory warranty issue as Harley had no control over that. That said, changing emissions-related components like the cat convertor or cams would void the emissions warranty as the MoCo could no longer guarantee that the bike was emission compliant. Harley lost a multi-million dollar lawsuit a few years back regarding providing the means to make their products operate out of emissions certifcation/compliance, so they are very sensitive to this! But if something like a stator failed for example, that would still be covered by your regular factory warranty even with the cat convertor removal as it's not an emissions compliance issue. Dealers often mis-quote warranty terms but you can usually get clarity from calling the factory direct. And the local laws like CARB in CA can cause other complications for emissions related stuff.
Good to know, so what would an aftermarket tuner void? I could see the extra power voiding the entire drive line and all electrical/software due to canbus. What are your thoughts?
After 20 some years working in warranty operations for a large auto manufacturer (that also makes motorcycles), voiding a warranty typically only happens when you use the product for non-specified activities...this would include racing, for-hire, a salvage vehicle, etc. This is all laid out in the Magnuson-Moss Warranty Act from the mid-1970s. Use of aftermarket performance or service parts and doing your own service do not void the warranty, unless those parts or installation cause the problem in question. For example, if your aftermarket oil filter came apart and trashed the engine, that would not be a factory warranty issue as Harley had no control over that. That said, changing emissions-related components like the cat convertor or cams would void the emissions warranty as the MoCo could no longer guarantee that the bike was emission compliant. Harley lost a multi-million dollar lawsuit a few years back regarding providing the means to make their products operate out of emissions certifcation/compliance, so they are very sensitive to this! But if something like a stator failed for example, that would still be covered by your regular factory warranty even with the cat convertor removal as it's not an emissions compliance issue. Dealers often mis-quote warranty terms but you can usually get clarity from calling the factory direct. And the local laws like CARB in CA can cause other complications for emissions related stuff.
Excelent. I knew about this law and have tried to explain to riders I ride with. Your clear explanation is so much better than how I have tried to explain. In fact, I will copy and send to my riders.
So an aftermarket tuner would void the emissions performance warranty for sure. The regular warranty would still be in place. If there was a problem that happened that was caused by the tuner, such as an over rev situation etc, it would also not be covered. If something else in the engine broke it would be up to Harley to prove that it was caused by the tuner. As I believe, the SE parts have the longer of the balance of the factory warranty or 1 year, including labor if installed by a dealer, which might impact your decision. Not sure what the SE warranty would be if you installed them yourself...you would have to prove the purchase/installation date and a dealer would have to diagnose to make the call on the nature of the problem.
Stage 2 ideas needed.
