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beobe99
11-05-2007, 08:00 PM
ADDED PICS BELOW

Im taking about a 60 dollar hit hear cause I ordered the wrong size/year. This piston is for 87-89 and I have an 86 short rod..

Heres the sizing on the box-

clear: 0.0030 (0.076mm)
2648cd cw18

the largest number across the top is

562M06725

Any qs. please feel free to ask. This is not a stock bore piston! so youll need to have your cylinder bored/honed.

beobe99@aol.com
mineralgrey01gt
11-05-2007, 08:04 PM
hey man, let me talk to my brother, he actually needs a piston for that year model bottom end. Ill see if the one is the same size bore as yours.


nvm, different sized bores.
beobe99
11-05-2007, 09:27 PM
Originally posted by mineralgrey01gt
hey man, let me talk to my brother, he actually needs a piston for that year model bottom end. Ill see if the one is the same size bore as yours.


nvm, different sized bores.

From those numbers i posted how can you tell bore size? I was told the only way is to measure the cylinder?

Thanks...

Also I installed this piston, saw it didnt fit, then took it off. it was never used...

Thanks guys
xlr810
11-05-2007, 09:58 PM
562M06725

562 indicates that it is the 88 style 250r piston. (86 style begins with 526)

6725 = 67.25mm, 0.050 oversize, 5th bore
beobe99
11-05-2007, 10:02 PM
Thank you xlr810

so when I order myself a picton for my 86 short rod Ill need

526MO6725?

0.050 oversize?

Thanks
xlr810
11-05-2007, 10:18 PM
526MO6725 is right.

That is the one you want.
beobe99
11-05-2007, 10:25 PM
Originally posted by xlr810
526MO6725 is right.

That is the one you want.

hey man thank you very much.. I checked on ebay for this # (526MO6725) and its saying its a 1.25 over size? is that correct

once again thank you very much..
beobe99
11-06-2007, 11:51 PM
pics of the package and piston
beobe99
11-06-2007, 11:52 PM
the piston (theres some oil on it from installing it before i found out its the wrong one )
j28d
11-07-2007, 05:09 PM
Order your next one from yamaha of troy, if you mention the dirtwheels ad they only charge 62 for a wiseco piston.
beobe99
11-07-2007, 06:28 PM
Originally posted by j28d
Order your next one from yamaha of troy, if you mention the dirtwheels ad they only charge 62 for a wiseco piston.

nice, thank you