Will a slip-on Exhaust void the warranty on a '25 Storm?

[ehh]

If there's an issue with the bike, just put the original muffler back on the bike before taking it to the dealer.

 

[zenbiker]

It will probably affect the fueling and it might require a remap to prevent running over lean. As to the warranty, this what I found in my Owner's Handbook:
The motorcycle’s exhaust silencers are warranted for 12 (twelve) months from the commencement of the general motorcycle warranty. During this 12 (twelve) month warranty period, internal corrosion or deformation of internal baffles are excluded from the warranty. After this 12 (twelve) month period, the motorcycle silencers are excluded from the terms of this warranty.

I take that to mean that the silencers can be replaced without affecting the warranty on the rest of the bike.

Removing the Cat and reducing back pressure could change the AFR. I would no do it until the warranty period is over. Triumph might become very creative if you have some type of major engine failure.

 

[zenbiker]

Removing the Cat and reducing back pressure could change the AFR. I would no do it until the warranty period is over. Triumph might become very creative if you have some type of major engine failure.

 

[atomsplitter]

Removing the Cat and reducing back pressure could change the AFR. I would no do it until the warranty period is over. Triumph might become very creative if you have some type of major engine failure.

The EFI system adaptations would change but not necessarily exceed operational limits, that is run so lean as to cause damage. The real problem is in efficiency not wear and tear. The motor is so robust and under stressed it would at most lose power in the upper rev range with a free flowing exhaust. Most of the slip-on silencers on the market make it clear that remapping is not required, it might be ideal, but not "required."

 

[Jhortz]

Here's the really important thing to remember about warranty claims, the manufacturer doesn't have to honour them until forced to do so by the legal system. So basically you will be left with a broken bike or a repair bill if they refuse warranty, until you force them to pay through a legal process. This needs to be considered in your decision, you can have as many people as you like agree with you that you should get warranty but their opinions carry no weight.
Long story short, warranty can be a fight and the less reason you give to refuse warranty the more likely it will be honoured without being forced. You need to work out if you want to potentially have that fight.

 

[Tripps]

If it's just a slip on you can always swap it back before you take it in if there's a warranty issue.