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I bought 98 1100 zxi that was blown up. It has a hole in the top of the piston on the front cylinder. Just wondering if this was a comon problem with these.Also if anyone has any ideas as to what would cause this. Any help would be greatly appreciated. The other 2 cylinders are fine.

Thanks Rob.
 

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Rob,

I am new to PWCs, but from mechanical experience I would say that sounds like a "blow hole". Piston overheated badly which causes a "meltdown". Take a look at this link:

PISTON DIAGNOSTIC GUIDE

"here are several reasons for a failure like this, here are the most common; air-leak at the magneto side crankshaft seal, too lean carb jetting, too far advanced ignition timing or faulty igniter box, too hot of a spark plug range, too high of a compression ratio, too low octane fuel."
 
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