took apart the 250 due to the fact it was hard starting and had a low compression test. the inside of the cylinder looks like new not a scratch. piston that was inside was a WISECO 642M06700 and looks good also which is standard bore of 67.00mm ..but the rings seem to be sloppy . out of the 2 rings if i put it in the cylinder seems sloppy .here is my ? if i put a new top end /piston/rings /etc/.will i be ok .i did put a magnet indide and it does stick so i would say its a Cylinder Sleeve. just dont want to put this back together and in a week it wont run .. strange how the rings went bad ..piston /Cylinder/head /look real good compared to most i have took apart over the years..i do have digi micromerter. do i need special tool to check for ring end gap. one ring in opening when in cylinder almost touches .the other ring has much more of a gap .. thx for any info.. :ride: :ride: :ride: