Suzuki GSX-R750 Service Manual page 27

2-10 PERIODIC MAINTENANCE
VALVE CLEARANCE ADJUSTMENT
The clearance is adjusted by replacing the existing tappet shim by
a thicker or thinner shim.
• Remove the intake or exhaust camshafts. ( 3-17)
• Remove the tappet and shim by fingers or magnetic hand.
• Check the figures printed on the shim. These figures indicate
the thickness of the shim, as illustrated.
• Select a replacement shim that will provide a clearance within
the specified range. For the purpose of this adjustment, a total
of 25 sizes of tappet shim are available ranging from 1.20 to
2.20 mm in steps of 0.05 mm. Fit the selected shim to the valve
stem end, with numbers toward tappet. Be sure to check shim
size with micrometer to ensure its size. Refer to the tappet shim
selection table (2-11, 2-12) for details.
NOTE:
* Be sure to apply engine oil to tappet shim top and bottom faces.
* When seating the tappet shim, be sure to face figure printed
surface to the tappet.
#
Reinstall the camshafts as the specified manner.
  3-92) 

(
• After replacing the tappet shim and camshafts, rotate the en-
gine so that the tappet is depressed fully. This will squeeze out
oil trapped between the shim and the tappet that could cause an
incorrect measurement, then check the clearance again to con-
firm that it is within the specified range.
• After finishing the valve clearance adjustment, reinstall the fol-
lowing items.
* Cylinder head cover .............................................. 3-97
* Spark plug and plug cap ....................................... 2-7
* Valve timing inspection plug ................................. 3-97
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1.70 mm