skegpro
Active VIP Member
So is this hitting on the drivers?
Maybe the front shock is bottoming out to easily?
Maybe the front shock is bottoming out to easily?
2019 Alpha
- Thread starter Go-Vertical
- Start date
skegpro
Active VIP Member
Maybe a issue with design and or the casting process.
Not a huge fan of casted snowmobile parts.
pfi572
Active VIP Member
If was mine I would have dealer look at it and if couldn’t get part right away it would get welded,plated and reinforced and ride on .
pfi572
Active VIP Member
Rail is cast ??
Disregard my comment on welding ,plating . Lol
skegpro
Active VIP Member
Its casted magnesium.
Good luck welding that.......
The top of the rail is where the cracks are starting.
Bottoming the suspension should stress and cracked the bottom.
Hard impact would stress the top of the rail as it would be the piece under tension not compression.
Weird to have a compression break on metal.
Either way a weak point may need to be addressed.
Going to give mine a thorough going over today since I have been laying some hard riding on it.
Kibbels
Active VIP Member
They are breaking in various places on rail... there are some cracked on top, bottom, front part of rail, mid rail ... so it’s guessing what & why at this time. The TKI I think is a bandaid for portion of rail. It’s possible some are going to be fine and others won’t due to maybe there is a process/compound/temperature/press/molding issue who the hell knows. I think we might have a problem Houston!!
skegpro
Active VIP Member
I would say if the rail by the antistab is contacting the drivers when the track bottoms that would put a downwards force on the beam and cause the topside cracks.
Probably not designed for that kind of force, in that direction.
Any contact marks on yours?
Would be interesting to let all the pressure out in the front shock and see if it does make contact in a sled stand.
skegpro
Active VIP Member
Or are these marks from the track clips?
skegpro
Active VIP Member
I guess there is a way.
Rjjtcross8
Active VIP Member
Might have to look at a brace kit for something preventative. Did not notice anything unusual with mine but I don’t mind beefing stuff up.
skegpro
Active VIP Member
Caper11
Active VIP Member
I wonder if that would help or make matters worse. Look at the cracks in the above photo. It looks to me where the stop is bolted or screwed its also stress cracking.
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Vertical-Extreme
Active VIP Member
I would like to know what some of these guys weigh.... I have a strong feeling these stress cracks are from some of the "bigger boys" bombing down a whooped up trail at 90 miles an hour. Which is hard on any sled, but would be worse on a single rail.
You have remember too AC puts very little air pressure in the center shock from stock. This could make the issue above worse.
I'm a smaller guy and take it easy on the trail, but ride hard were they are supposed to be ridden hard and I've had zero issues. A few other guys on social media sending these sleds too without issues.
You have remember too AC puts very little air pressure in the center shock from stock. This could make the issue above worse.
I'm a smaller guy and take it easy on the trail, but ride hard were they are supposed to be ridden hard and I've had zero issues. A few other guys on social media sending these sleds too without issues.
WesG
Active member
Just info for anyone interested.
180 lb rider. 90 lbs front ski shocks clicker 1. 40 lbs fts clicker 1. 145 lbs rts clicker 1. 170 miles on the machine. During this time, I did not hit anything that made me think I would have damaged my rear skid. Finished a ride, thawed the sled out in the shop. Set air pressures up (75 skis, 55 fts, 140 rts, all clicker 2 except fts clicker 3) checked sliders, set track tension, loaded sled on the deck and drove to riding area. Pulled in and found my rail broke between the bottom fts mount and the bogy wheel. Didn't even get to unload. Figure it must have had a hairline crack and the drive in finished it off. Did not see a crack in the shop but that could be easily missed when not really looking for cracks. No signs of impact on the rail or suspension. Local shop did a great job of getting me fixed up and going so not a big ride time loss. 38 years old so I am not a road warrior. Best way I could describe it would be I cruise on the moguls not pound.
Love the sled. Most fun snowmobile I have rode (started in the mountains in 98').
Had to turn the photo to meet the size requirements
180 lb rider. 90 lbs front ski shocks clicker 1. 40 lbs fts clicker 1. 145 lbs rts clicker 1. 170 miles on the machine. During this time, I did not hit anything that made me think I would have damaged my rear skid. Finished a ride, thawed the sled out in the shop. Set air pressures up (75 skis, 55 fts, 140 rts, all clicker 2 except fts clicker 3) checked sliders, set track tension, loaded sled on the deck and drove to riding area. Pulled in and found my rail broke between the bottom fts mount and the bogy wheel. Didn't even get to unload. Figure it must have had a hairline crack and the drive in finished it off. Did not see a crack in the shop but that could be easily missed when not really looking for cracks. No signs of impact on the rail or suspension. Local shop did a great job of getting me fixed up and going so not a big ride time loss. 38 years old so I am not a road warrior. Best way I could describe it would be I cruise on the moguls not pound.
Love the sled. Most fun snowmobile I have rode (started in the mountains in 98').
Had to turn the photo to meet the size requirements
Attachments
skegpro
Active VIP Member
Junk. Cat has a big problem on there hands.
IMO you have too much in the front shocks and not enough in the center shock and the rear could probably be 150-160.
I am starting to think these failures are because of bottoming.
Dawizman
Active VIP Member
With the front skid shock mounted on one side like it appears to be, it would be putting some uneven forces on the skid at that point in my opinion. Perhaps that is part of the issue? Its hard to tell where all these failures are occurring, but I've seen a few for sure where the nose has broken off.
mountainsledmania
Active VIP Member
I rode an alpha on the weekend. Some poor guy was brave enough to lend it to me for 30 min or so. All i can say is... i bleed doo yellow, and the alpha one up's it. Anyone that says different is full of it. and i would say its power is equal to an 850 do0... its amazing what real clutches can accomplish. Bravo.
Cat401
Active VIP Member
Is this because of low snow levels till recently and things were hit?........or is it a design problem?.......
if it's the latter.....design issue...that is one of the downsides of buying the 1st year of production.....you are the real test rider.....???
I'm sure Cat will come through with a warrantable fix or upgrade........may take time, likely see some changes in the 2nd year.
skegpro
Active VIP Member
Do know how drilling more holes is gonna help......
