I know the 400 has a compression release on the rear side of the cylinder like a Maico, but did the 250 ever have one? I have not seen a 250 cylinder that had one, but was not sure. I bought a cylinder on eBay that had the compression release valve in it and it was listed as a 250. I have not seen it yet so I have not measured the bore to see what size it is.
(http://i1177.photobucket.com/albums/x348/kartwheel68/B4Q7wWkKGrHgoH-EEEjlLlLvtBKejqc0ow_12_zpsbd4c31d6.jpg)
(http://i1177.photobucket.com/albums/x348/kartwheel68/B4RpgmkKGrHgoH-CEEjlLl0F63BKejqfjlbQ_12_zpsfbc02cf2.jpg)
Brian
thats a 400 cylinder in the picture. i have seen that ad before and actually sent a note to tell him chi jer
I thought so. He had another one without the compression release.
Brian