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Posted

im guessing it was just wore the fuck out, im pretty sure it was an 02 and those were the factory pistions, funny thing is it was still running when we tore it apart but it was starting to have overheating issues.  left side had 90psi didn't check the right

Posted

just pulled my buddies bike apart the other day because his dropped a cylinder.  His piston looked ALMOST identical....however you could blatantly see that it was from wear.  his pistons got so sloppy that the piston managed to cock itself a little and snap the crown on the exhaust port of the cylinder.   

Posted

only had the overheating problem the last time it was rode, before that it was being ridden every weekend with no problems

Posted

If you look at the piston you can see the area the ring goes in gets wider toward the damaged area. That means the piston got hot enough for the aluminum to move. If the piston would have been cold it wouldve just cracked off. You can probably see some of the melted piston in the exhaust.

Posted

Too late now, but you should have done a leakdown test before you tore it apart. So at this point, unless you can visibly see why it leaned out, you have 3 choices.

1) Rebuild the top end and hope and pray

2) Rebuild the top end, do a leakdown test and then tear it back apart to fix what ever is leaking

3) Split the cases and reseal the whole motor and then do a leakdown test.

  • Like 1
Posted

no shit, the front of the piston is chewed up from the cylinder. it is now egg shaped from being ran to long like that and will take atleast 2 bores to clean them up.

Posted

for some reason my dads banshee kept overheating, i wonder what would of caused it to be doing that lol

 

 

 

130130_0000_zps0fa13e85.jpg

fucking hell mate!

the piston is fucked up like my last years thongs!

Posted

Those blue things are Flip-Flops.

 

Who the fuck ever called them thongs?

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