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Honda MX & Off-Road Dirt Bikes
CR250 2002 Top End questions- OEM or Weisco?
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[QUOTE="Rcannon, post: 895625, member: 26263"] Pace, the exhaust bridge theory sounds spot on. We did not drill this on an oem piston we used in a Honda CR 80 (same bridged design). I screwed up and did not drill. At hour 7 the piston exploded. The grove became deep enough to catch the exhaust port...BOOM! We also neglected to drill the holes the first time we used a Weisco piston. The piston still lasted 20+ hours. When I removed the piston the bridge had ground a groove in the piston 4 millimeters deep! The piston did not shatter, however. Did you guys know that all the oem postons are made by the same company? Look under any oem piston and you will see "ART". [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
CR250 2002 Top End questions- OEM or Weisco?
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