IF YOUR TALKING BOUT HOW TO SET OHV S I FOUND SITE STATES ON A YAMAHA 18 HP V-TWIN SHOULD BE IN THE MIDDLE OF 0.0031 - 0.0047 AT TOP DEAD CENTER SET MY YT6700 SAME MOTOR TO 0.0035 TO 38 CLOSE TO MIDDLE MINE RUNS GOOD START UP AT 0.0035 SO LEFT IT THERE 2 YEARS AGO THIS YEAR GOIN TRY UP LIL MORE FEELER GAGE U WILL NEED BUY GOES 0.30 - 0.33 - 0.35 - 0.38 AND 0.40MM THIS FEELER GAGE IS THE BIGGER OF THE 2 DIFF GAGES THE SMALLER GAGE WOULD BE USED FOR SMALLER MOTORS
LIKE BRIGGS AND TECUMSA