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300excrazy98
11-02-2006, 03:28 PM
What year piston is this??
300excrazy98
11-02-2006, 03:29 PM
another... also how could i tell what kind of cases i have??
300excrazy98
11-02-2006, 03:30 PM
last one.
matt250r21
11-02-2006, 06:09 PM
Looks like an 87-89 Wiesco 250R piston.
wilkin250r
11-02-2006, 10:40 PM
Look for a number stamped on the top of the piston...
C-LEIGH RACING
11-03-2006, 06:56 AM
Originally posted by 300excrazy98
What year piston is this??

Wiseco 562P series 87/88/89 cylinders.

On the cases,
On the underside of the case, right under the crankshaft the cases are thinner in that area on the 88/89 cases, about 1/8" thick.
On the 85/86/87 250R cases that same area is about 1/4" thick.
With the cases together, if you look in that area & it looks like the gasket is gone, you have the old model 85/86/87 cases.
Gaskets not realy gone if it looks like it, its just that all of the center case gaskets are cut to the width of the new model 88/89 cases. Look close in the crack & you can see the gasket.
Neil