250 quadrunner
 

Rebuilding the top end on my dads 2001 Suzuki 250 quadrunner Cylinder needs board and a new piston, after pulling the head i found intake valve and seat is damaged so I plan on pulling a head off a parts bike I have but while looking at parts through Suzuki I noticed they list two different heads and cylinders in there book for the 250 quad runner so does anyone know what the difference is between the 2?

300 cylinder
 

Anyone know if a 300 cylinder (280cc) with fit the cases of a 250 (246cc) , both use 72mm stroke I have an extra 300 engine I'll take apart if no one has an answer