Broken Barrel

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5/3/2017 6:54 AM

Anybody experienced this? I've see 4T's blowing up like this , but not a 2T. This is a YZ 250 2012.
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5/3/2017 6:57 AM

hassbeen wrote:

Anybody experienced this? I've see 4T's blowing up like this , but not a 2T. This is a YZ 250 2012.
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Photo

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5/3/2017 7:23 AM

Any idea on how many hours on this bike? When was the top end rebuilt and were everything in spec (clearence). Did anybody port this cylinder?

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5/3/2017 7:24 AM

I had that happen once, also a yammie 2 stroke. Not nearly that bad, cracked around one mounting bolts, still had to replace. I've never seen anything like that one.

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step derp, step step derp - my signature dance move

5/3/2017 7:40 AM

Big time head gasket leak will cause it to hydrolock and cause that. I have seen it many times with jet skis.

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Tomac and/or Anderson for 2020.....

5/3/2017 8:15 AM

Haha holy shit dude thats a new one to me.

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2009 Kawasaki KX450F
2009 Kawasaki KX250F
2002 Suzuki GSXR 600

5/3/2017 8:29 AM

wassat wassat wassat wassat
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2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @hamdaddyof2 & @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

5/3/2017 11:12 AM

That's a good one! Water doesn't compress and had to go somewhere - hopefully the cases are okay.

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5/3/2017 11:59 AM

BobPA wrote:

Big time head gasket leak will cause it to hydrolock and cause that. I have seen it many times with jet skis.

X2

Paw Paw

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5/3/2017 12:44 PM

We can't fix that one.....lol

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5/3/2017 5:13 PM
Edited Date/Time: 5/3/2017 5:17 PM

Premix ratio + coolant leak = piston hole. Even the lower a/f ratio can melt a hole if rich enough.

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RTFM & AYFV

5/3/2017 5:20 PM

Almost as bad as this....

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5/3/2017 9:02 PM

Nitrous backfire? Lol...

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5/4/2017 3:51 AM

Bought 2nd hand so don't know the history on rebuilds etc. Compression was fine so I suspect not too many hours on it. Still had original tires as new.
Anyway thanks for all the advise. Will be splitting the casing this week will post more later.

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5/4/2017 3:52 AM

mjr119 wrote:

Almost as bad as this....

Photo

Ouch that's worse, I'm hoping to at least save the casings. LOL

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5/4/2017 3:52 AM

Millennium Technologies wrote:

We can't fix that one.....lol

Superglue & Duct tape?

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5/6/2017 11:53 AM

E-bikes lika Alta have a bright future

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5/6/2017 3:32 PM

You had the wrong powerband installed

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5/7/2017 11:30 PM

rmoto003 wrote:

You had the wrong powerband installed

LOL was actually attempting to combine engine braking with hole shot device.laughing

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