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Discussion Starter #1
I LEAREND MY FRIEND'S 2005 POLARS FUSION 900 BLOW OUT BY BAD PISTON AND TEAR MOTOR DOWN AND SHOWED PCRANKCASE BOTTOM HOLE AND HEAD CYLINDER DOME LOTS NICKS MARK AND BAD CRANKSHAFT'S ROD BY PISTON SHIRT BROKE CHIP CAUSE

FOUND POLARIS PARTS FOR 2005 and 2006 900 cc piston showed:

polaris number 2203098 from 2006 900 piston (replaces 2202811 from 2005 900 cc piston)
THAT WHY POLARIS WON'T TELL US OR WON'T RECALL???

HIS SON AND I WILL TEAR HIS SON 2005 FUSION 900 AND MINE 2005.5 SWITCHBACK 900 AND REPLACE NEW PISTON (number 2203098) to save $$$$$ without damage everything with poor piston too thin wall cause broke chips and crack..

I SUGGEST REPLACE ALL PISTONS YOUR 2005 POLARIS 900CC.

SEE PICTURES:
 

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Wow thats all there is to say but ya i would def replace those and i'll be telling my friends.
Thanks
 

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Discussion Starter #4
My friend and his son and I tear down our 2005 Fusion(4,500 miles) and my switchback(2,800 miles) 900 motors last nite and found my 900 switchback 900 exhaust port show crack hair or nick hair.
see pictures.
My friend's motor blow out and he said NEVER over 175 Temp since his new sled.

I will get new pistons from 2006 900 cc and will measure thick wall piston compare our old pistons then I will post ..
 

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I'm curious to get the results on the comparisons. It's one thing to have mods to improve your sleds, but when you're adding mods to allow your engine to run... that's interesting, lol.
 

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I guess these posts were bogus... no results means false accusations against the 900 engine. Unless someone's brave enough to fess up???
 

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I guess these posts were bogus... no results means false accusations against the 900 engine. Unless someone's brave enough to fess up???[/b]
Dont get spooked Pepsi but that not an unheard of issue with 05 900's. I have seen this exact same thing several times....thats why mine has the 06 pistons..:) The 06 piston does indeed have a stronger skirt and thicker ring land area to prevent breakage. It's not uncommon in other brands either...the ZR9 is known to have skirt cracking at higher mileage as well. We replaced a set in a buddy of mines sled just this past fall after 5000 miles...both were cracked and about to fail.
 

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Dont get spooked Pepsi but that not an unheard of issue with 05 900's. I have seen this exact same thing several times....thats why mine has the 06 pistons..:) The 06 piston does indeed have a stronger skirt and thicker ring land area to prevent breakage. It's not uncommon in other brands either...the ZR9 is known to have skirt cracking at higher mileage as well. We replaced a set in a buddy of mines sled just this past fall after 5000 miles...both were cracked and about to fail.[/b]
Yeah, well, those things do spook me. Why can't I just get a normal engine? LOL. The old 4-stroke bikes we have are 35 and 17 years old and they've never needed engine servicing. I can't get a bloody new engine that's been known to last longer than 2 years :confused:
 
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