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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ125 Compression test
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[QUOTE="marcusgunby, post: 173090, member: 17066"] The comp test isnt a good one for judging when to change a piston.A better bet is to log the number of hours on the piston/ring.A hard rider should look at changing the ring every 5 hours-this is because the YZ has a very large exhaust port and can go through rings quicker than the other brands with smaller ports.A slower rider could extend this to maybe 12hours but i wouldnt go longer than this.They tend to snag the ring and damage the exhaust port bridge. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ125 Compression test
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