Routy
Serious Thumper
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SuzukiSavage.com Rocks!
Posts: 2280
Winston Oregon
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If its running good, it doesn't have any burnt valves. If it has piston slap, you won't find it w/o checking the clearance tween the piston skirt and cyl wall. If the piston is cracked, it is most common to be in the wrist pin/skirt area, which would be very hard to see thru the SP hole.
Plain water thru the air intake, along w/ WOT is commonly used to rid piston/combustion chamber of carbon.
If you do not have noise on cold startup, and at idle, I would not suspect any part of the piston to be at fault.
Rich
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