400ex piston and sleeve

[250xsupertrapp]

400ex piston and sleeve in my 250x, it would be a 325 but will the piston fit on the rod?

[bad ex]

nope the piston will not fit the 250x crank,and the sleeve is most likely to long to fit in the cylinder,and i think that the piston would be way to big for the 250x head,hope this helps .kevin

[honda300EXtreme]

if i recall correctly, but dont quote me,

the 400ex cylinder will work,

but i know for a fack a 400ex piston wont work, because the wristpin diameter on the 300ex/250x is too small for the piston

[250xsupertrapp]

what about a 350x piston and sleeve

[bad ex]

you would have to use the 350x piston,sleeve,and con rod on the 300ex crank,i wanted to do this but i'm not sure if it would be reliable.kevin

[250xsupertrapp]

whats the differance between the 250 and 300 rod? none if i remember but i learn new **** every day

[2muchquad]

My 385ex actually uses a 400ex cylinder sleeve with a 86mm je piston.I did have to clearance the cases a bit for it to drop in.The 300ex uses a 17mm wrist pin.The 350x piston uses a 21mm wrist pin so thats out.4 stroke tech makes a big bore kit for the 250x/300ex that uses a 86mm piston but it has a 18mm wrist pin.You'll have to get a rod pressed on your crank from a 250es(big red)3 wheeler to run it though.The big end of the rod fits the 250x crank journals.;)