#1 warranty rule
Find a dealership capable with the desire to help you with warranty work.
I have worked at a GM dealership for 7 years. When it comes to warranty the coverage is only as good as the dealership is. Never be afraid to ask questions prior to any modification you plan on doing.
I purchased my pioneer 1000-5 from a powersports dealer. I talked with the sales and service department during my negotiations and confirmed everything I wanted to do up front. Long story short I was told that as long as I stuck with high lifter brand parts for my lift and used their recommended tire sizes I would be covered. The dealer I purchased from was a high lifter distributor as well. I have not had to use my warranty coverage yet. I did purchase the extended coverage after our negotiations. I drove 1.5 hours to purchase from this dealer who just rocked at the time of purchase.
I had the local Honda dealership who refused to even talk price at the time. I simply asked if they were open to negotiating and the immediate response I received was no. I politely asked why they were so firm on price and the response I was given by the salesman was "look if you don't want to pay what it's listed for we know someone else will" I immediately was turned off by these guys. Long story short I really don't like them.
Final example. A friend of mine purchased his 1000-3 from the local dealer previously mentioned. 3 days into ownership he had delayed shifts. They charged him $80 to adjust the cables. I was floored. I don't care if it's maintenance or not you literally just bought it and it's your first week. 10 months in his cv shaft started clicking/making noise. During the first month my friend changed tires to 28" kenda executioner. Everything else was stock. The local dealer refused to warranty cover it because they told him the tires caused pre mature wear.
I could rant about warranty work all day. I have plenty of GM, and Ford warranty coverages that I have done personally and have had Co workers get into.
The short of the long is again, warranty is only as good as your dealer is.
In today's world, the pen is mightier than the wrench.