interesting factory cylinder sleeve issue

[icytea132]

sup fellas,

 i found an interesting problem with my factory cylinder sleeve from factory, that the bore is .022" excentric from the outside diameter of the sleeve its self, but the outside diameter of the sleeve and the cylinders inside diameter are concentric. which leads me to believe that the operator of the machine had better things to do at the time and walk away, and the machine was not set correctly or he did not realize what was going on. has anyone ever had or seen this problem? these are the cylinders that came from factory on this bike. its funny too cause i looked and the chamfer on the bottom of the cylinder and it goes on a slight slant, as if it were not correctly centered in the bore, the top of the sleeve has a black ring around the top of it like as if it wasn't centered with the head. and you can see the cylinder is thinner on one side verses the other. 

 

it amazes me something like this can be so over looked

[sleeper06]

I've seen plenty of factory non centered bores, that's why most engines can't be bored past 80 over and some can

[registered user]

pretty common for them to be off centered. got several like that. the way the stock cylinders are made is pretty old skool and not very accurate

[icytea132]

thanks for replying guys, its interesting to hear that. i ended up watchin videos of how they make sleeves and was just curious where they could have gone wrong. these manufactures were spin casting them then doing the bore first. not sure how the sleeves in the yamahas were made back then. but thanks for the reply was a little nervous of using it. still am as im trying to get this engine to last me a while do to bills and stuff.  

[Yamahafan#1]

Wow this is crazy im gonna check mine.