official_style Posted April 6, 2009 Report Posted April 6, 2009 I took the yz125 apart, and this is what it looked like inside. The guy i got the bike from gave me a stock bore wiseco piston. Should i have this cylinder replated, resleeved, or have this sleeve bored and get a slightly larger piston? the head looks fucked up too, is it junk or can that be repaired? sorry for the dumb questions, this is my first time actually having to get inside a cylinder and change a piston. Quote
blowit Posted April 6, 2009 Report Posted April 6, 2009 I took the yz125 apart, and this is what it looked like inside. The guy i got the bike from gave me a stock bore wiseco piston. Should i have this cylinder replated, resleeved, or have this sleeve bored and get a slightly larger piston? the head looks fucked up too, is it junk or can that be repaired? sorry for the dumb questions, this is my first time actually having to get inside a cylinder and change a piston. Until the bore is measured, it is only a guess if the cyl needs bored. It is not plated. That is a CI sleeve from the earlier days. Everything looks salvageable but you need to mic the bore first. Head will need recut or just find a used one from egay. Brandon Quote
official_style Posted April 6, 2009 Author Report Posted April 6, 2009 do you know of a good place to send it out to? Quote
blowit Posted April 6, 2009 Report Posted April 6, 2009 do you know of a good place to send it out to? Nearly any competent bike shop can inspect and repair that. Keep in mind we have found many shops will not take the time or have the skills to properly measure a bore and just say "bore it" and cost you a bore job. Your bore may be fine but no clue without measurements. An engine machine shop should also be able to help you. I would recommend just getting a used head to reduce the complexity of this repair. Brandon Quote
official_style Posted April 6, 2009 Author Report Posted April 6, 2009 thanks, im going to take it to a machine shop today and see what they say. for the head, you wouldnt know what years are interchangeable with 1995 would you? Quote
blowit Posted April 6, 2009 Report Posted April 6, 2009 thanks, im going to take it to a machine shop today and see what they say. for the head, you wouldnt know what years are interchangeable with 1995 would you? Nof off the top of my head, no. Even if PNs are different, there is likely only minimal differences. I recommend hitting up a YZ rider or dealer on that question. Quote
TJScott Posted April 6, 2009 Report Posted April 6, 2009 check your manual to see if your cylinder is nikasil plated. i know my 94 cylinder was. Quote
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