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Yamaha MX & Off-Road Dirt Bikes
yz125 eating pistons
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[QUOTE="Rich Rohrich, post: 688569, member: 16241"] If the CDI was advancing the timing to to point of hurting the engine, it would show up on the plug, the piston crown and the cylinder head. Spotting over advanced timing on the plug is really simple by looking closely at the ground strap on the plug. If the Yamaha reps couldn't see that then they might want to start spending more time in the shop looking at broken parts and learning proper forensic techniques. ;) Determining root cause of a piston or cylinder failure isn't rocket science but it does take a willingness to work slowly and carefully without jumping to convienient conclusions. You'll get no arguement from me that intermittent electrical problems will always be tougher to trace because they don't leave visible clues like piston or cylinder failures do. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
yz125 eating pistons
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