Hello guy's I have a short story and a few questions for a friend with an 02 WR 426. We went on an awsome trip to the Upper Penisula of MI and put on 130 Miles the first day and 120 miles the second. My friend Jon had a little trouble on the return trip.... Big Blue just locked up on him. Jon is very good at maintaning his machine. It had a fresh oil change and screen cleaning, along with air filter, just before the trip. After she quit on him we checked oil, anti-freeze air and fuel. it all looked good. Last winter the bike went into the dealer for valve adustment and tune up. The dealer said he put YZ adjustments in the Carb, cam and she was all set to scream for the summer. Has any one had this happen?? and is there a big bore kit for the 426?? Help!!