2008 skidoo xp crank runout

[sketch96]

My son bought a 2008 summit x xp. He has put 200 miles on it so far with no belt issues or anything other than the last ride it seemed to be running rich in the midrange. Would take some throttle to clear it out and all good after that.

Brought it back and deceided to look at the pto bearing and grease it for maintenance reasons only. checked crank runout for fun........totally shocked to see .025"!! you can see the wobble when pulling it over without needing a dial indicator!!!!!

I guess its obviously time for a rebuild.......where is the best place to get a new crank assembly that will be guaranteed true and reasonably priced??? Could there be problems with the cases? What would you do?


Thanks!

 

[mikejulien12]

Best bet might be a new short block...comes with the updated crank and everything

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[sketch96]

Best bet might be a new short block...comes with the updated crank and everything

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updated crank?? didn't know they did an update!! Just tore the motor down and cyl and pistons are in great shape. Barely a mark on the cyl just glazed, no crosshatch left at all. bottom end looks good too, Just the center bearings sound really dry. No marks in the cases that make me think I cant reuse them. gonna hone the cyl. put new rktek pistons in and either send the crank to mongoose for a rebuild or I guess look into the updated crank.

would you have a part number for the updated crank????

 

[revbyu]

25 thou - thats huge - must have vibrated terribly ! think max is 4 1/2 thou ! made sure cases dont have dark spot wear the brg rides - usually indicates crank brg movement !

 

[mikejulien12]

I dont have a part number. I had the crank bearing go on my ptek and it took the rest of the motor with it so i had to go short block.

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[sketch96]

25 thou - thats huge - must have vibrated terribly ! think max is 4 1/2 thou ! made sure cases dont have dark spot wear the brg rides - usually indicates crank brg movement !

took it apart today and there is dark spots on the bottom half of the cases in under the 2 center bearings! Was wondering what to look for. The 2 center bearing sound dry when i spin them but other than that i dont see much else wrong. No up and down play in the bearings when you try to move the races by hand. Are the cases still ok to reuse???

 

[Cableguy]

don't think mongoose is doing cranks anymore they are buying rebuilt one from someone out east cvtech maybe can prob get direct cause doo wants to much for them

 

[sketch96]

don't think mongoose is doing cranks anymore they are buying rebuilt one from someone out east cvtech maybe can prob get direct cause doo wants to much for them

Just talked to mongoose and they do still rebuild cranks. They also have cranks in stock for most models that are used for exchange if you need one fast.

 

[neilsleder]

I think the updated crank is a 2010 and up ptek crank. So if you are getting an exchange I would go with the newer one


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[tex78]

don't think mongoose is doing cranks anymore they are buying rebuilt one from someone out east cvtech maybe can prob get direct cause doo wants to much for them

Don't get either, cause ya get what ya pay for, meaning c.v tech or mongoose

Just talked to mongoose and they do still rebuild cranks. They also have cranks in stock for most models that are used for exchange if you need one fast.

 

[tex78]

I think the updated crank is a 2010 and up ptek crank. So if you are getting an exchange I would go with the newer one


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Yes the doo one is the 2010 and newer

Has less drilled out for bolt and is a way tougher crank nose

 

[sketch96]

wont work for a 2008. The mag side is bigger for the 2009 and up models. You would need a new mag

 

[sketch96]

Don't get either, cause ya get what ya pay for, meaning c.v tech or mongoose

so what are you saying? Don't rebuild the crank and just buy a new one???