The idle was fine before a little fast as I have no choke, it just got noisy on the back lifters, as i have to do the carb at the same time and it can't idleI was going to slacken off the lash by 1/8 of turn after rebuilding the carb just so i can get the idle so I can adjusted on the carb and then redo the valve lash. Does this seem a good plan?