Mazda MX-5 Miata Sport 2007 Manual page 87

2006-08 ENGINE Mechanical - Overhaul - 2.0L (LF) & 2.3L (L3) - Mazda6 & MX-5 Miata
Fig. 86: Measuring Gear Backlash
Courtesy of MAZDA MOTORS CORP.
If the backlash exceeds the specified range, remeasure the backlash and,

using the adjustment shim selection table, select the proper shim,
according to the following procedure.
CAUTION:
Value range
0.005-0.101 mm {0.00019-0.0039 in}
1. Using master adjustment shim (No.50), assemble the balancer unit to the cylinder block, then measure the
backlash.
2. Select the proper adjustment shim according to the measured value.
3. Install the selected adjustment shim to the balancer unit, then assemble the balancer unit to the cylinder
block.
Adjustment shim selection table
2007 Mazda MX-5 Miata Sport
When measuring the backlash, rotate the crankshaft one full rotation

and verify that it is within the specified range at all of the following
six positions: 10°, 30°, 100°, 190°, 210°, 280° ATDC.