Engine Down! My Stage IV 800 CFI loses crank bearing, piston, cylinder, ect....

[deschutes]

oh and I had the wires plugged together, the SLP Stage IV is backwards of a stock sled. SO I was running the "no Ethanol" setting.

I'm confused.... The manual states: "Non-ethanol fuel: CONNECT the black/blue wires to the pink wire when using non-ethanol blended fuel."

So if the SLP Stage IV is backwards of stock, you were running in Ethanol mode if the wires were connected. Unless my 2010 is different.

 

[harrysmith500]

I may have lied, I'll look at the sticker on my belt cover and see what it says about the wires.

I do know it was set to run ethanol free and it never deto'd me.

 

[2dabar]

If slp flashed the ecu then its backwards from stock polaris flash
diconnect for non ethanol fuel connect for ethanol fuel

 

[harrysmith500]

So i had my wire disconnected for ethanol free gas. It's this way because of the SLP Flash, which sucks!

 

[sonday_2]

Gotta thank amsoil for doing that to you..Heard a few guys using that oil and crank or piston giving out..Thats junk oil..

 

[diamonddave]

Gotta thank amsoil for doing that to you..Heard a few guys using that oil and crank or piston giving out..Thats junk oil..

I use Redline in sleds but AMS OIL ATF is the best for Transmissions.

 

[draginrmk]

agreed, amsoil 2 stroke oils are puke IMO but seems the atf they sell is good stuff..again..JMO

 

[milehighassassin]

I really don't think the oil is to blame here.

Contact Amsoil and invite them to inspect the motor. I know they will defend their oil but it would be interesting to see what they think caused the failure.

 

[Cruiseboy]

EVERY motor I used Amsoil in has blown up!

 

[diamonddave]

You could always have an oil analysis done if you're curious. You can find out some pretty cool stuff as to what let go and why.

Harry, how much better did the Stage IV run then the other sleds with the PCV, etc...???

 

[155Assault]

Gotta thank amsoil for doing that to you..Heard a few guys using that oil and crank or piston giving out..Thats junk oil..

I Disagree completely. I have 4200 miles on my D7 without a hiccup, and made 2200 on my 08 D8 before the first failure. That is better than most people using Polaris oil. I use Amsoil Interceptor and have since 2007 when my D7 was new.

 

[braapin]

I also have had two burn downs on my p.o.s.2010 with a stage IV - why should I go back to stock reeds and cylinder.

 

[diamonddave]

I also have had two burn downs on my p.o.s.2010 with a stage IV - why should I go back to stock reeds and cylinder.

I can't speak for the porting but V-force reeds do not hold up in the CFI. This has been an on-going issue since 08. Carls now uses carbon tech petals with stock reed cages.

 

[jim9006]

IMO Cascadesnowjunky hit it on the nose.. Looks to me as if the bearing cage came apart (quality issue). My dirt bikes eat reeds all the time. So IMO at best the reeds were a contribtury factor. Oil? Humm maybe.

 

[harrysmith500]

The stage IV sled ran a tad better than the PCV/SLP single sleds, not enough to justify the cost of that kit.
After riding both the stage IV and a pCV/SLP I think I like how the pcv/slp sled runs anyway.

Oil was not to blame here, tons of oil everywhere when we tore it down, no rust either.

V Force reeds are super bad, they basically have self destructed in under 800 miles.

My mechanic compared the new stock cylinder with my broken ported cylinder and wasn't very impressed with the flow improvements saying "they didn't take off much material".

I had my mechanic talk to the guys at PMS about the fix and they encouraged him to not port my new cylinders, stating that they have seem very few potted cylinders that actually run better than stock cylinders.

If you already are ported I'd just leave it alone, but I'd get rid of the SLP flash and run a power commander.

 

[harrysmith500]

I agree the bearing cage was a huge factor (and probably the sole cause of the failure) major quality issue on that bearing.
I didn't like the blue'd steel i saw on the pistons and what not from how aggressive the flash was.

 

[sled_guy]

While you are that far down I would find the '10 cylinder and open up the case top to accept the bigger cylinder skirt.

sled_guy

 

[harrysmith500]

While you are that far down I would find the '10 cylinder and open up the case top to accept the bigger cylinder skirt.

sled_guy

My mechanic gets home from Mccall tomorrow and I'll ask him if that used 08 cylinder will work. If it doesn't I'll go for the 2010 cyl.

Thanks man

 

[harrysmith500]

so the 2008 cylinder is a go. It looks pretty good. Bought the crank today from Tri-city for $1000. ughhhhhh

 

[milehighassassin]

EVERY motor I used Amsoil in has blown up!

And every sled I have ran Amsoil in, has ran great, no issues