Younggunnaz,
If you have a outbored <88mm ironsleve,you know you can use a Ho..a piston!
89mm and further up to 92mm I think.But you have to make a spacer underneath to raise
barell to suite porttimings.
About barell -89 with some "strange" inlet-roof ,I?m blind proberly,but unlight me plz again!
//doordie