Re: need advice in replaceing pistons
Not enough info! Force made two different versions of the 150 with different bores. The 125 was to the best of my knowledge 3.3125 bore. So it depends upon which 150 you have.
If the pistons are that loose, it is a moot point anyway because more than likely, you are going to need to disassemble and overbore the cylinders to clean them up. This will require oversized pistons.