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Bent Subframe


I only had the a arms off and I am not sure where exactly it is bent but I know it is the sub frame because I ordered a new a arm and threw it on and it made no difference. looking at the front of the sub frame you can tell that the left side is pushed back. Didnt want to lose more time riding so I didnt bother investigating further now that I know what the problem is.
 
I don't think that it is a weak subframe vs where you hit the arm. I did the same thing on my RX1 and it bent the arms, the steering arm, the torsion bar and lastly, broke the bulkhead where the arms bolted into place. This was with a 5 mile per hour accident striking only the outer spindle and with no damage to the ski. Only good thing was that this gave me an excuse to buy the FX Nytro while I repaired the RX1.
 
I also have a bent subframe on my nytro. I hit a culvert pretty hard and definately deserved to break some thing. I dont think the subframe is weak, maybe just improperly designed. Dont get me wrong, I am not an engineer, it just seems to me like there should be more diagonal bracing or gussets. If you look at it there really is not much bracing to keep the structure from twisting.
 
lol i hear what your saying jorligan but i didnt even bend my a arms thats the thing. The a arms held the hit but the sub frame couldnt. but whatever I will see what I can do about it later.
 
If you spend any time over on Dootalk, you'll see posts similar to this one. I got to thinking about it and I'm not sure that it is a design flaw with the front clip but instead just the nature of the beast with the rider forward layout. The Rev's had weak nuns, now the XP's appear to have weak S-modules. The Nytro is similar to the Rev's and XP's in that the front clip is modular in construction and can be removed. Replacement looks to be an easier job on the Nytro than on the Doo's.

I don't think there is any easy design fix as long as we want long travel suspensions that require super long a-arms. Those a-arms create a lot of leverage on their mounting points when they impact an object. Looking back in time, think about how short the a-arms were on the old AFS Cat's and the first Prowler.

I think that unless they build a sled like a tank, which none of us would want to ride, we just have to live with some of the downsides of long travel suspensions.
 
AKrider said:
If you spend any time over on Dootalk, you'll see posts similar to this one. I got to thinking about it and I'm not sure that it is a design flaw with the front clip but instead just the nature of the beast with the rider forward layout. The Rev's had weak nuns, now the XP's appear to have weak S-modules. The Nytro is similar to the Rev's and XP's in that the front clip is modular in construction and can be removed. Replacement looks to be an easier job on the Nytro than on the Doo's.

I don't think there is any easy design fix as long as we want long travel suspensions that require super long a-arms. Those a-arms create a lot of leverage on their mounting points when they impact an object. Looking back in time, think about how short the a-arms were on the old AFS Cat's and the first Prowler.

I think that unless they build a sled like a tank, which none of us would want to ride, we just have to live with some of the downsides of long travel suspensions.
Click to expand...
I agree with this to some extent. I have owned 2 IQ racer chassis sleds and they are indestructible.
 
No kidding, the IQ's racer chassis seems to have evolved into a very rugged and durable platform. I think because the it uses a triangular shaped bulkhead along with triangular a-arms. This design seems to offer greater strength as compared to Doo or the Nytro. I don't know how the Cats are holding up but I'd assume they must have it figured out?
 
my friends uncles f1000 (07) had the a arm fall right off under regular trail riding. We were looking at it before we left, and then my friend pulled up at a stop and we noticed that most of it was hanging down. From what I've heard, this is not a one time thing with the F1000. So I think cat is in the same boat as we are.
 
Can someone give us an idea where these things are bending.

08fxnytro_7ii_86d76e29.jpg
 
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