2007 Arctic Cat DVX/Utility 250 ATV Service Manual, Page 39Get this manual
7Using needle nose pliers, remove one piston pin circlipTake care not to drop it into the crankcase KM718A
6Remove the cam chain guide; then disconnect the coolant hose and remove the cylinderSupport the piston with rubber bands or other suitable supportsAccount for two dowel pins and the cylinder gasket
8Using Piston Pin Puller (pn 0644-328), remove the piston pinAccount for the opposite-side circlipRemove the pistonNOTE: It is advisable to remove the opposite-side circlip prior to using the pullerNOTE: Support the connecting rod with rubber bands to avoid damaging the rod or install connecting rod holder
! CAUTION
AT THIS POINT
To service valves and cylinder head, see Servicing Top-Side Components sub-section
Do not allow the connecting rod to go down inside the crankcaseIf the rod is down inside the crankcase and the crankshaft is rotated, severe damage will result