Cylinder numbers

[toolman]

I bought these cylinders to put togather a bike for my son. Had them checked at a machine shop with a bore gauage to see if they need bored here are the numbers tell me what you think.

The second numbers are 90 degree's to the first at about the same height. all measurments are in inches.

 

Cylinder #1

2.561 2.5614

2.5603 2.5634

2.5606 2.5616

 

 

Cylinder #2

2.5614 2.5635

2.5616 2.5645

2.5613 2.5624

 

Do you think I can get away with just a hone and new 65mm pistons and rings if so where is the best place to get a set of wiseco prolites.

 

Thanks

Tim

[_Hex*]

you put them in inches, its alot easier to read in millimeters alot of these guys wont convert it lol

[toolman]

I bought these cylinders to put togather a bike for my son. Had them checked at a machine shop with a bore gauage to see if they need bored here are the numbers tell me what you think.

The second numbers are 90 degree's to the first at about the same height.

 

Cylinder #1

65.0494 --------65.05956

65.03162--------- 65.11036

65.03924---------65.06464

 

 

Cylinder #2

65.05956 --------- 65.1129

65.06464 ---------65.1383

65.05702 --------- 6508496

 

Do you think I can get away with just a hone and new 65mm pistons and rings if so where is the best place to get a set of wiseco prolites.

 

Thanks

Tim

change to meteric

[mopar1rules]

if i remember correctly, yamaha says that the maximum out of round a cylinder can be is .0004". you're much more than that midway up the cylinder, which is probably close to the bottom of your stroke. if it were me, i would get a fresh bore. if the out of round was like .001" to .0015", i would say just hone it, but .003" out of round is too much for my taste.