motor question

[wingnut548]

I have an 85 atc 250r block and transmission that is in a buddys bike he bought an 87 model crank (std) new from weisco and he bought a 4.5mm head spacer now the jug and cylinder are the originals. Now he got an 87 weisco 40 over piston in the kit. The question is can he use this piston becouse I was under the understanding that he had to use an 86 model or earlier piston.:confused:

[deathman53]

if he gets rid of the spacer plate he can, but there is another issue, the 87+ piston tends to get stuck in the intake of a 85/86 cylinder. He is gonna need a 85/86 piston.

[wingnut548]

thanks thats what i was thinking