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Another possible subframe

Yamahnator

TY 4 Stroke Guru
Joined
Jan 1, 2004
Messages
854
Location
Central NY
Alright, obviously this is tweaked. The kicker is this... It's on my wifes sled with 275 miles on it! I've been watching mine like a hawk and have pounded the snot out of it, no problems. Her at 130 lb's soakin wet it tweaked, go figure. I rode it before our Feb trip this week, and ended up looking at it and it's tweaked. No damage to it, no even marks on the ski and the carbide looked pristine. So obviously nothing caught the ski either.

So I called two dealers about it, both said they needed the sled in order to tear it apart. I explained that I had my trip this week and it seemed to ride good. I then had a guy who's a former yamaha mechanic, and a good one at that, ride it. He also said it seemed ok to ride. So I told the dealer that I would drop it off after the ride. This was last Thurs. On Monday, on our first ride, in a gnarled out Tug Hill trail she ends up losing it in the moguls and rolls it. Gets herself 5 stitches, and a badly bruised leg (hopefully no ligament damage).

So Wed I take it to the dealer. They say I'm SOL. That I should have dropped it off before hand. They call Yamaha say I'm SOL. I mentioned this site and the problems others are saying and the dealer says that you can't believe everything that's on the forum. I say I realize that but I CAN believe what I see before my eyes which matches what's on the forum. No damage on the bottom of the sled still, the roll damage was all on top (bars, gaurds ect). I pointed out that I had called them about it before hand and they said the call wasn't enough they needed to see it.

Anyway, I understand why they won't and it's going on my insurance, but I'm at least going to report it here. Make sure you get the sled immediately to your dealer if you have this issue to document it. Yamaha has come through in the past for me with issues, I truly hope they address this issue. Other than this they've had a fairly smooth launch of a new model. It would be a shame for them to get a bad rep just because they didn't step up for this one issue. Even if it means just replacing them as they come in bent with something beefier. Because not everyone is having this problem but they could potentially in the future.
 

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My guess is it's just the upper a-arm. Have you taken any measurements on the sled to verify t's the sub frame? From what I've seen, if the skis hits something, the spindle rotates around the lower ball joint which in turn pushes the tie rod forward bending the upper a-arm. I used a prybar and bent mine back. The sub frame is actually pretty beefy(it would take some pretty good force to twist the a-arm mounts), and so are the lower a-arms, which is why I think it takes a pretty substantial hit to bend them. Measure off your tunnel to each lower ball joint and to each tie rod on top of the spindle. That will tell you if it's an a-arm or sub frame.
 
Do you have the sled, just run out with a tape and take a few measurments real quick. You might not need to take anything apart.
 
That sounds frustrating.
Hope your wifes injurys are not ligaments. I tore 3 stepping off a porch and rolled my foot and not only is it VERY painful, but a long recovery and they say that ligament damage is permanent and will never be as good as new.
 
wow thats stupid. This is my first yamaha and I must say that them not looking into this subframe problem is down right dumb. It doesnt matter if you rolled it if it clearly has no ski or a frame damage the sumframe should not bend. This is a problem they need to fix. And just from my own experience I would take it apart before using a crow bar because it might look like an A frame but it is not. I took both sides off and matched them up and there where no bends. I even ordered new ones thinking that there was no way it could bend the subframe that easily but it did. And I hope your wife is ok. What bad luck.
 
i understand what caleb is explaining and it is one possibility but, make sure to look at the lower A arm as well, as it has the lower shock mount on it and if that arm is driven back and the upper stays in place, the shock spring will rub on the upper arm.

i believe that is the case with mine. my wife is 125 lbs soakin wet, and has bent a spindle. i have had an issue with my front end right side with the shock being too close at the rear upper A arm since day one.

this past week in ontario i heard a clicking noise and looked at the suspension, found the spring was on the a arm. we went to the next destination slowly, and tied the rear of the sled down, hooked a strap to the lower part of the spindle and pulled just enough to get the arm and shock apart so it was moving and safe to ride.

the next day i hit an ice chunk (went back to investigate) with the left side ski, figured i wasted that side now but, looking it over the left side was ok and now the right side spring was even further from the arm than when we had pulled it ahead.

this leads me to believe something is very soft up front. i dont know what, i cant pin point anything bent. it would be nice for someone (yamaha), to come up with a measuring procedure to figure what is bent for the arms and the subframe unit. i'd hate to just start replacing stuff that isnt bent.

i have been in contact with my dealer from day one, even asked to let me know when the rep comes in so i can have my sled there. i dont want to give the sled up in prime time unless something is way out of whack or definately damaged beyond safe.

i also believe i have a bent right spindle (slight) now, but again cant truely tell. i hope this gets straightened out for all of us.

on a brighter note, i did finally get my front end of my mtx to behave very well after putting on a set of slydog powderhounds, bergstrom triple point carbides and ski savers. (no shimming of the bumper).

my set up is, front springs alittle tighter, pulled the limiter down one hole, front shock on the rear skid to 2 from full soft. rear spring for my weight (apex spring on soft), adjusted transfer to red line (less transfer). the sled has very nice trail manors and turns well on and offtrail. glad i stayed with it.

i do like the sled dont get me wrong, probably the best sled i have ever been on. just a few quirks we need some serious help with. ski
 
What you are seeing could just be because of the slop in the A arm bushings and ball joints, combined with the fact that the skis are clamped down on the trailer. If the skis are clamped down and the back of the sled moves around, it could flex the front end quite a bit. Unclamp the skis, raise the skis off the ground, and take measurements from the end of the A-arms to a point somewhere back on the tunnel - just measure to the same feature on both sides.

You can't really tell anything just by looking at the front springs.
 
I hope you get more help then I have been getting with nytro issues. We are all fighting the same battle the worst is when the dealer you use, won't stand behind you and listen when you say you hit nothing. Its so frustrating.
 
Old Thumper said:
What you are seeing could just be because of the slop in the A arm bushings and ball joints, combined with the fact that the skis are clamped down on the trailer. If the skis are clamped down and the back of the sled moves around, it could flex the front end quite a bit. Unclamp the skis, raise the skis off the ground, and take measurements from the end of the A-arms to a point somewhere back on the tunnel - just measure to the same feature on both sides.

You can't really tell anything just by looking at the front springs.

It was like that on the trail. Always trailered with the brake on and studs in the track so it's not moving around on the trailer. It's not slop in the bushings.

Something's tweaked and it's just a matter of tearing it apart and figuring it out.
 
Best thing to do is call Yamaha USA/Canada direct and let them know, especially if you feel like your dealer won't stand behind you. Funny how they automatically assume you hit something...frustrating to say the least ! :o|
 
i'm not looking at the sled clamped on a trailer, i have looked at it on the snow on it's own weight. have lifted the front bumper up to take the weight off and set it back down straight. have looked at it on the garage floor, on its own weight, lifted from underneath with a jack, lifted with a lift. always the same thing... something is tweaked, subframe, or a arms. like in body/frame repair, a measuring procedure could tell us what is bent and where, and how to repair, or what to replace. this is what we are asking for help with. ski
 
my subframe is bent....

hey i just had mine down at my dealer and showed them my bent subframe...... woohoo.... they are gonna fix next week while i am gone parts are even in...... here is what yamaha told my service guy...... they said that they had a bad stamp or whatever when they were producing some of these pieces...... however it was not always bent.... so i dont understand that theory
 
I put a video up on how much "slop" is in the FX Nytro front end with the stock bushings. This was Fasttoy17's FX Nytro after 450 miles. I put an oilite front bushing kit in and it eliminated all looseness. This "slop" in the front end allows movement which can "tweak" items I believe. Look at how loose your front end is in between rides and watch it carefully!

http://www.youtube.com/watch?v=MXmIKW7VWjY
 


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