jlsparky7 Posted September 7, 2006 Report Share Posted September 7, 2006 Ive heard that for boring out a cylinder you have to get it machined. In other cases ive heard that its a sleave insert that you get put in. Just wondering if both of those were the case. Cause once you get to .60 over and you blow ur topend what do you do? If someone could lay out all the options and possibilities as far as boring goes that would be great. Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted September 7, 2006 Report Share Posted September 7, 2006 If your at 60 over I think you can bore it one or two more times. I am not sure how many to be certian. When your on your last bore job you can have the cylinders resleeved. They press out the steel sleeve and install a new one. Starting over with the stock size bore. There are some sleves that can be installed in a stock cylinder that alow you to run a 68mm bore piston. These are usually refered to "Big Bore Kits". Quote Link to comment Share on other sites More sharing options...
tjz70 Posted September 7, 2006 Report Share Posted September 7, 2006 I mine 0.90 (66.25mm) I know wiseco offers 66.5mm pistons and rings mine has a full drag port and i never have had a problem. As long as you dont haave any huge groves in it and it dont look like a egg shape you should have a few bores left. I would buy a good set of used jugs on ebay or hq if there trashed. you can get them prtty reasonable. hope this gives you an idea opf what you have to work with . Quote Link to comment Share on other sites More sharing options...
FireHead Posted September 7, 2006 Report Share Posted September 7, 2006 If your at 60 over I think you can bore it one or two more times. I am not sure how many to be certian. When your on your last bore job you can have the cylinders resleeved. They press out the steel sleeve and install a new one. Starting over with the stock size bore. There are some sleves that can be installed in a stock cylinder that alow you to run a 68mm bore piston. These are usually refered to "Big Bore Kits". This is basically correct. Big Bore kits generally require the aluminum cykinder casting to be machined larger to accept a larger O.D. sleeve. :baseball_santa: Quote Link to comment Share on other sites More sharing options...
dajogejr Posted September 7, 2006 Report Share Posted September 7, 2006 From .060 over, wiseco makes a .080 over kit (they skip .070) They also make a .090 and .100...but I think most will agree, once you go that thin on the walls, you're sitting on a gernade.... Once you use up the live of the cylinder (.080 to .100 over) you'll have to get the cast iron machined (bored) to accept a sleeve in it's place Quote Link to comment Share on other sites More sharing options...
jlsparky7 Posted September 8, 2006 Author Report Share Posted September 8, 2006 Thanks guys i think im pretty sure what you mean now. Quote Link to comment Share on other sites More sharing options...
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