From:David klein
Subject:engine locks down and refires Date:Mon Jun 8 22:02:28 2015
New here and with the hummer. I have a 59 and when I ride for a few miles at 50+ mph it will lock down and slide the rear tire. I can immediately pull the clutch in and kick it and fires right back up. If I ride at lower speeds it runs fine with no trouble. Any ideals? I run the 25:1 oil mixture. As I read thru the site it looks like years of experience here. I have already used a lot of info from this site to get it running. Thanks to all !! Also, how do I know if it's a 125 or 165 motor.

Thanks for everything guys