2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 58Get this manual
CCylinder DPiston NOTE: Steps 1-10 in the preceding sub-section must precede this procedure
11Remove the two nuts securing the cylinder to the crankcase12Lift the cylinder off the crankcase taking care not to allow the piston to drop against the crankcaseAccount for the gasket and two alignment pins CC377D
9Remove the cylinder head from the cylinder, the gasket, and account for two alignment pms
NOTE: It may be necessary to remove the stud wO-ring to aid in removing the cylinder; however, there is no stud O-ring on the 250