does anyone know if the pistons from 87-90 are interchangeable? ive got 2 brand new .50 over pistons for an 87,but i have a 1990 cylinder

 

thatd be really cool if someone knew this

 

The '87 piston was different.

 

Now dont take my word for this but when i took the piston out of my 89, nad took it in to get a new one 20 over it was a 87 piston, and i told him to double checkthe part number off the old one and he did and it wasa 87 piston, and it runs good so it should work.

Mark

 

No, the part number for an '87 piston is different than an '88. The '87 piston had a slightly different skirt shape for different port timing. The head is also different (along with several other things).

Here are prints from the Suzuki manual...
LT250R engine data

 

then why does it work inmy 89? The part number was for the 87 that came out of mine and thats what i put in, runs great, I'm interested now...

Mark

 

yes,everywhere i checked for the part numbers they were diferent,and i know that the ports on the newer ones are diferent.so i would imagine the piston shape/ring placement is diferent as well. well anyways i passed on the 90'cylinder,and bought an 87 cylinder.