NickisGod Posted February 11, 2010 Report Share Posted February 11, 2010 so i finally got around to striping my shee down after my right cylinder blew and i was kind surprised by what i found. i noticed my carbs intake boot was loose on one side allowing air into the reed cage prematurely causing the left side of the right cylinder to burn up leaving a shit stain behind. the pistons aluminum seems to have binded itself to the walls and some one recommended muriatic acid. i just though i post up the damage to see if anyone had any other suggestions. Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted February 11, 2010 Report Share Posted February 11, 2010 Doesn't look bad at all... You can have it bored as long as yur not at your max already. Quote Link to comment Share on other sites More sharing options...
bholmes Posted February 11, 2010 Report Share Posted February 11, 2010 not so sure about the muratic acid. I don't think it would touch the aluminum it'll just eat at your steel sleeve. I'd just go at it with a descent sandpaper/emory cloth in a cross hatch pattern and try to break it up and then get you a hone to run through it and see how well it cleans up. I did something similar on my YZ490 once, but when the piston melted down the ring seized and scuffed the walls pretty good and I ended up having to bore it. Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted February 11, 2010 Report Share Posted February 11, 2010 IT just dawned on me that your running a cub... You can try honing it.... Are those cylinders nik'ed? You may have damaged the nik. Quote Link to comment Share on other sites More sharing options...
NickisGod Posted February 12, 2010 Author Report Share Posted February 12, 2010 yes its a cub, and im pretty sure is nikils or w.e. its called. the damage is onlt on one side of one cylinder, do u think it be safe just as it is? Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted February 12, 2010 Report Share Posted February 12, 2010 (edited) No you should get it fixed. I wouldn't ever think of running something with sores on the cylinder walls. I am sure others might disagree, but I am not going to try and skimp on something like that and ruin a 800 dollar set of cylinders. You never know... Fixing it might be nothing more then running a hone through it... But you should have a builder check it out to see. Edited February 12, 2010 by Bansh-eman Quote Link to comment Share on other sites More sharing options...
broncbob Posted February 12, 2010 Report Share Posted February 12, 2010 Dude, have it poked and re-coated for sure. That's the great thing about the niksil, you never really punch out a cylinder, they just take the old stuff out and re-coat it to the original size. Quote Link to comment Share on other sites More sharing options...
NickisGod Posted February 12, 2010 Author Report Share Posted February 12, 2010 how much is that gunna cost. i kinda think ill be able to remove most of it considering its on the surface of the wall not pitted in. Quote Link to comment Share on other sites More sharing options...
Rodneya Posted February 12, 2010 Report Share Posted February 12, 2010 Usually an air leak will lean you out and burn a hole through the piston, not cause it to seize. Quote Link to comment Share on other sites More sharing options...
NickisGod Posted February 12, 2010 Author Report Share Posted February 12, 2010 who said anythig about seizing? i said melted. the rings and piston were one and poop stains were left behind Quote Link to comment Share on other sites More sharing options...
Rodneya Posted February 12, 2010 Report Share Posted February 12, 2010 When the piston gets too hot and expands too much and leaves leaves streaks of itself on the sides of the cylinder it is seizing. It does not have to lock up. Hammering the motor when it is cold will cause a cold seize, and not lock the motor up as well, just leave piston material on the bore. Quote Link to comment Share on other sites More sharing options...
broncbob Posted February 12, 2010 Report Share Posted February 12, 2010 It will be 250, give or take to have it poked and re-coated. Quote Link to comment Share on other sites More sharing options...
bholmes Posted February 12, 2010 Report Share Posted February 12, 2010 You could just throw them out side in your garbage can....what's your address again? Quote Link to comment Share on other sites More sharing options...
Bansh-eman Posted February 12, 2010 Report Share Posted February 12, 2010 it's a few hundred to have them redone. Find a builder that is a Millenium distributor because they can get it done for cheaper than if you send it directly to Millenium your self. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted February 12, 2010 Report Share Posted February 12, 2010 I thought with a nikasil cylinger you could wipe down the bore with a type of acid. The acid would remove the aluminum and leave the bore untouched.just remember the cylinders are made of aluminum too so don't get any into the ports. Then once you get al the aluminum off check the nikasil to make sure it doesn't have any pitting. I would also check the bore to make sure it isn't out of round. Quote Link to comment Share on other sites More sharing options...
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