This is what i get for Jumpin Ship

[GabrielGoes]

Hole blown through crank case... the thread is posted here:

http://www.kzrider.com/forum/2-engine/594644-hole-blown-through-crankcase#638207

Any drag race guys or anyone at all have ever seen anything like it? WHAT THE HECK?!?! Jeez i really feel like its time to get back on a gs

[GS1150Pilot]

The KZs are pretty damned tough. Like people were telling you on that forum, something went way wrong from the inside, most likely, and it was unlikely to have anything to do with overfilling the motor.

[ozman]

see what happens when you lose the faith and become a heretic
its karma !


um no seriously did you figure out what part was making a disorderly exit from your engine via the crankcases ?

ozman

[blowerbike]

lost a rod once...came out the front and made a big mess in the water box
a friend went over and picked up a piece of the rod and burnt the fark out of his hand..silly goose!

[Guest]

Is that a roller or a insert crank?

[Guest]

Just looked on a micro fiche that is a insert bearing motor and it may have a broken rod bolt. Looking at where the hole is it lines up pretty well

[TeamDar]

Holes in both the top and bottom case halves in the same location. That pretty well rules out excess pressure or casting flaws. Fracture is from the inside out from the looks of the holes. Something was not very happy in there and tried to get out.

[daturat100r]

Spannering time ,dont run it till you opened it up and found out exctly what went on .Definately new cases will be needed here

[Colin Green]

Seen that on a mates Yamaha 650 after it developed a bit of a rattle/knock. The rod busted just below the piston and flogged around on the big end punching two very similar holes in a split second before locking the back wheel in the oil trail. Very handy thing to happen. I wasn't there when it was pulled down, but the mechanics theory was that the rod may have been cast with a partial crack and a dropped/busted valve impacting with the piston crown caused the rod to break.

[GSX1000E]

From the OP link: "She starts/runs on all 4 cylinders which rules out timing, pistons, rings in my book."

[Colin Green]

From the OP link: "She starts/runs on all 4 cylinders which rules out timing, pistons, rings in my book."

Holy carp batman! Didn't read it. Just looked at the pics. Hard to believe... but?

[GabrielGoes]

Resolution has come. I was totally wrong but I still think hydrolock was the case

[GS1150Pilot]

I don't think hydrolock could remotely cause that.

[Fjbj40]

Hydrolock would not cause that.

But, if you experienced a mild form of hydrolock, as you stated from leaving the fuel on, then you may have caused damage that only revealed itself at a latter point.

This is probably the result of a minor bend in the connecting rod from the hydrolock.

My theory,
Daryl