wilbar Posted January 21, 2017 hey guys, just got a 1999 yz 250 and i want to get a top end rebuild kit i measured to cylinder size and it measured 66.294 i check i few times and reassembled the bike i just checked online and it appears standard cylinder sizes are bigger, the cylinder looks alot newer than the bike, are the measurements defiantly incorrent, look forward to replies Share this post Link to post Share on other sites
