It includes checking, tightening, adjusting and lubricating of basically everything. I’m fine paying for that.
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I don't see anything on that list that couldn't be completed with 1 hour of labor. 2 tops if there's tupperware that needs to be removed to get some things like the rear master cylinder or whatever.
Anyhow, part of the issue here was OP willingly paying for stuff he didn't authorize at the time of pickup. It doesn't make it right after the fact, but if I authorized an oil change and then showed up and found hundreds or thousands of dollars of extra (potentially unnecessary, as was the case here ) of unauthorized work, well, I'd be having a discussion with the service manager in very short order. And if there was no resolution, it would get very heated in very short order. Tactful (I'm the last person to start throwing **** and such, but I'm the first person to make it quite clear you're not going to F'n bulldoze me), but heated.
Still no resolution? Fine, I'll pay it to get my bike out of your shop, but my objections will be noted on the work order beside my signature, and I'd be making it quite clear you'll be dealing with a lawsuit via small claims court which I'll be filing the second I get home - "Can I get your business card please so I have your name for the court documents and to let the process server who to ask for when he arrives to serve you?".
Usually the L words (Lawsuit, or Lawyer) gets a companies attention.
I'm not typically a litigious sort of person, but stuff like this burns my ass and would gleefully file a small claims case (as well as a Consumer Protection Act complaint, etc etc) in very short order. I'd spend more than the cost of the damn work just to make a point to them.
Wrong me in what should be an amicable business dealing by trying to take me for a ride to pad your pockets, and I'll F'n spite you.
And you won't ever need to lay out a dime, because I guarantee almost 100% of the time they suddenly come to an "understanding" and delete the charge before any of it becomes necessary (or you even walk out of the place) because
they know they're afoul of the law and will lose and it'll just end up costing them a bunch of money to hire a lawyer to defend them. I speak from experience, I'll leave it at that.