I agree....changing a petcock should not be an issue if you have some unrelated mechanical issue.  Go talk with them beforehand and see what they have to say.

My spoiled rich nephew had a V-6 Camaro with only 1,200 mile on it, and installed a twin turbo kit from some aftermarket company.  You can betcha that voided the warranty on any engine or drive train related issue!  Would the factory provide warranty replacement on a cup holder?  Maybe.  Their family is a really good customer to that dealer and they sell them a lot of new cars - so even if the factory didn't warranty it....the dealer might do it for them to keep a happy customer.

It all really comes down to the relationship you have with the dealer, and if the warranty issue is a real one that is product failure - or was caused by accidental damage or abuse.

TECHNICALLY, if you bring in a vehicle to have a stock, unmodified part fixed or replaced then they should do it under warranty unless you've done something to cause the part to fail. A muffler leak is completely unrelated to aftermarket turn signals. However, a lot of places will try to void ANY warranty if you've modified anything at all. Stand up for your rights as a consumer!

Cars, and electronic devices, because cars are getting more and more e-gadgets every year, are getting worse and worse on warranties.

Look at Apple. Buy an iPhone, jailbreak it so you can add the apps you, the consumer, want installed, and now Big Fruit says they can't help you with any support. It has nothing to do with the apps causing problems (they ran fine) it was because the guy who wrote it didn't want to turn over all rights to HIS app to Big Fruit. So his programs are blacklisted.

Where Big fruit nails you is when the send out an upgrade. Add this, and your jailbreak goes bye-bye, and all the blacklisted apps get removed, courtesy of Big Fruit, because we know better.

I will die before I spend another dollar on that companies products.

Cars today are getting almost as bad, more so if you live in a state with "smog testing" as part of your yearly inspection, like NY. Cars can be mechanically perfect, ready to run a race even, but if the computer decides your gas cap isn't on tight enough (no joke, it's one of the fails in this state) then you're not getting a new inspection sticker. I've heard from several people in the auto business that the manufacturers are trying to get cars to the point where no one but them can work on them. They want you to pop the hood and you find a sticker that proclaims "NUSPI" - No User Servicable Parts Inside.

If the warranty was Already over, there would BE no reason to wait to make changes, because there would be no Warranty they could VOID due TO those mods.. Context,,

Warranties are fickle things according to a friend in the business.

Some times all it takes is for the customer to come in all red in the face cursing the dealer and all those inside for the warranty to be "voided".

And another way... the person bringing in the vehicle "knows what is wrong" or "knows more about this vehicle than any mechanic", boom, sorry but the "limited warranty" does not cover this....

READ the warranties on anything you ARE GOING TO BUY, before you purchase said item, yeah they are long and lawyers write them, but you have to 'understand' them before you purchase, because when you sign that line, you are saying you fully understand the "warranty agreement".

If you work on an engine, or modify the engine, and your transmission fails... the engine is technically a part of the "drive train", so are any components "ON OR CONNECTED TO", the engine, "which affects its operation"... trust me, its in print, on the warranty, somewhere, on every vehicle's contract.... like I said, lawyers write these things.

Even if you just "add a cell phone charger", its draws current, from the electrical system, which is directly affecting the operation of the vehicle, and it was not an "option" originally for the vehicle, you could void the warranty.

I hate to be the dark horse, but if you are an ass, and are VERY demanding of a dealer, your problem is probably not going to be fixed if you have "modded" your vehicle in any way shape or form.

Now on the other side, if you talk to your dealers mechanics politely, and ask direct questions about a mod you want to put on the bike, you can circumvent the "warranty void". I always have had good relations with all the mechs and the parts counter guys. Some times I just stop in to browse new stuffs and look at next years bikes.

Get to know your dealers or the ones in the out lying areas.... I have never had a problem with any bike I took in, even though I heavily modify all of them with fuse boxes and outlets for charging, different seats, different suspensions and lighting.

And if worse comes to worse, you can always tell them "well hell, joe here told me it would not void my warranty!".... and joe will get the job of fixing your ride, covered under his warranty... LOL