Broken W arms have been a very common problem!
See this link:
http://www.ty4stroke.com/viewtopic.php? ... broke++arm
67% of the respondants have had the issue, pretty common...
The "Brick Wall" "We haven't seen this before" response always kills me. lol
A few notes:
My W arm broke and cost me a couple days riding, I re-inforced it well to finish out last year, then replaced it with a Doo Skid!
MAJOR improvement!
Can see the replacement here:
http://www.ty4stroke.com/viewtopic.php?t=64698
(Anything that fails on me, gets replaced with a stronger part. I won't put up with loosing riding time if I can help it! Same thing happened with my secondary, into the trash it went!)
(I now have an unreliable Cat sled I need the money to replace yet, lol)
The $400 surprises me, that is actually a pretty good deal on the labor.
(I know it doesn't seem that way as you are prying the money out of your wallet!)
If you add up all the parts prices, I would bet that you would be amazed how much the warranty DID cover!
The track alone at $400 is a pretty good deal, not counting ANY other parts OR labor.
Although it may not feel like it right now, the warranty paid for itself and THEN some.
This is a good example of why it is important to have a good relationship with your dealer, get on a first name basis.
It makes a huge difference when you need help with something like this.
Had a Cat that needed multiple things, it was NEVER an issue to get the dealer to take care of it.
(Same dealer for my Yamaha btw)
The first name basis thing works...
To be fair to your dealer, I inspected my idlers closely before my last trip, had NO signs of ANY problem.
When I got back, two idlers had de-laminated. Go figure. lol
So even if they did inspect them, they can't predict if they will come apart. Really wouldn't hold that against them.
Your new W arm WILL fail.
It is only a matter of When.
It will only take longer to fail than last time...
I know, you don't want to hear this...
It will start by the paint flaking off the arm where it flexes too much, watch for it.
That will tell you the weak points and where it needs re-inforced.
Rant:
I love my sled & especially the motor, but the rear suspensions kill me...
LOTS of heavy metal and weak all over...
It's like they threw a bunch of metal at the problem without looking at WHAT it needs...
My suspension now is over 30 pounds LIGHTER and is stronger than the existing one was.
That is a good example of using the metal where it is needed.
Watch for the new cracking and fix it before it totally disintegrates is my suggestion.
It is relatively easy to fix once in a while, rather than going through what you did this time.
Hope this helps!