beastro Posted February 26, 2011 Report Posted February 26, 2011 was checking out my compression and noticed that it was Very low... 40to be exact in my left cylinder. took off the head and noticed a nice chunk missing off of the piston. The left dome seems fine, there is bits of the piston that broke of kind of stuck to it. but i can scrape most off with my finger nail. my question is should i be worried about what happend to the rest of what broke off? http://i1233.photobucket.com/albums/ff388/beastorey010/100_1193.jpg http://i1233.photobucket.com/albums/ff388/beastorey010/100_1183.jpg Quote
zach45 Posted February 26, 2011 Report Posted February 26, 2011 i would at least pull the jugs off to feel the play in the crank... any scarring on the walls? Quote
beastro Posted February 26, 2011 Author Report Posted February 26, 2011 (edited) i would at least pull the jugs off to feel the play in the crank... any scarring on the walls? yes there are some scratches but i cant feel them when i run my finger across them.....would a pic help Edited February 26, 2011 by beastro Quote
Coupelx Posted February 26, 2011 Report Posted February 26, 2011 looks to me like the piston was melted rather than broken. especially since its at the exhaust port. Quote
beastro Posted February 26, 2011 Author Report Posted February 26, 2011 looks to me like the piston was melted rather than broken. especially since its at the exhaust port. sooo...if it that is the case then do you think it was just a faulty piston or is there more to it then just that Quote
zach45 Posted February 26, 2011 Report Posted February 26, 2011 try to get some clear pictures of the wall... Quote
beastro Posted February 26, 2011 Author Report Posted February 26, 2011 try to get some clear pictures of the wall... http://i1233.photobucket.com/albums/ff388/beastorey010/100_1195.jpg http://i1233.photobucket.com/albums/ff388/beastorey010/100_1194.jpg Quote
zach45 Posted February 26, 2011 Report Posted February 26, 2011 YUP... I would think AT least you would need a hone... i would probably bump u pa bore size and get a fresh bore and hone how was your bike running before this happened? Quote
Coupelx Posted February 26, 2011 Report Posted February 26, 2011 so annoyingly big signatures aside that piston got real hot. see how its rough around that area and spreads over to the transfers. though from the piston color it looks to have been jetted correctly. so it may have happened in the past and run like that. You will need to rebuild the top end most likely. Do a leakdown test after reassembly and verify everything is as it should be. Quote
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