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Old 12-05-2012, 12:41 PM   #6
trailrider383
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Joined: Jan 2008
Location: NP, ID
Oddometer: 3,040
Quote:
Originally Posted by boozewz View Post
Really appreciate the comments and help fellas.

Dust entry is a major possibilty as I'm based in Saudi and all our riding is in the desert.

I just inspected the pistons, and lo and behold, there is a crack on the bottom side.

Could the impact from the piston scoring the liner be such that it would cause the piston head to crack? That seems like a serious failure, regardless of the dust entry or not.

Google "yzf450 sucking sand through breather hose". It's a well known issue with those bikes. If you are high centered/stuck on a sand dune or in deep water it sucks stuff up through the hose into the engine.
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