What piston do I need to ask for?

[wvspeedfreak]

I have a 250r bottom end that had a big bore top end on it.Now I want to put a stock cylinder back on.It had a spacer plate under the cylinder so I am needing to know what piston needs to be in there.I am fairly new to the 250r's so I am assuming that the spacer plate means it is a long rod bottom end so does that mean only certain year pistons will work?Thanks in advance.

[bobby bo]

how thick is your spacer?? 3/16 i think you use a 86 piston
if smaller thin one you use a yz250 piston dont know what year... cant really remember.. or call up baldwin motorsports... the spacer means longrod so your gonna have to use it again unless you change the crank maybe rod... dont quote me on this

[wvspeedfreak]

It is the thicker 3/16" spacer.

[bobby bo]

than you use the 86 piston,,, thats what baldwin told me.. i have the same spacer..

[wvspeedfreak]

Thanks bobby bo............ck your pm's.

[wvspeedfreak]

Next question.....what piston (86 style) would you reccomend?

[bobby bo]

wiseco.. you can get them on ebay.. just make sure you install it the right way,, the book shows the arrow one way but thats for a stock piston from honda not wiseco..

[jonc623]

arrow almost always points to exaust port