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Dirt Bike Brands - Other
Caught a Ring...Major Damage. Q's.
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[QUOTE="keithb7, post: 1046271, member: 58846"] I own a 93 CR265 and on sunday had a massive failure. Bottom piston ring bound up on the upper exh port, tore up the port pretty bad, piston is thrashed, as well the head looks like it has been through a blender. I checked and the locating dowel in the piston ring groove is still in place, so it appears that the ring did not turn. I put new piston rings in about 1.5 mos ago, and rode it about 4 times since then. Everything was great until Sunday past. What are some of the reasons a ring would catch on exh port? Assuming rings are correct size, proper oil mixture and jetting, cylinder is nikasil coated. Could poor warm up cause this? I run a wiseco piston, and before the failure allowed the bike to warm up for about a minute. It was not cold, I had rode it hard about an hour earlier. Question 2: There are pieces of piston ring down in the bottom under the crank. Is there a way to get them out without splitting the cases? Remove the engine turn it over and blast in some varsol? Thanks, Keith [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Caught a Ring...Major Damage. Q's.
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