Base Gasket Selection
Tools required
17mm wrench
1mm flexible solder material
measurement calipers
When rebuilding the ‘top end’ of your Cobra motorcycle, care must be taken to
ensure the proper squish clearance. Squish clearance is defined as the minimum
distance between cylinder head and piston at TDC, and there are negative
effects of either having too much or too little clearance. Since parts like the crank,
connecting rod, cylinder head, piston, and crankcases all have varying
tolerances, Cobra offers several different base gasket thickness’ to ensure that
you can always set the squish clearance of your engine to factory specifications.
For base gasket replacement use the code (see figure 21 for location) along with
the table on the following page reorder the correct thickness gasket.
Figure 21
Supplied Base
Gasket Thickness
NOTE: Tolerances will affect the actual gasket thicknesses.
If during the course of the maintenance more parts than the base gasket are
changed, the squish clearance should be measured, and possibly a different
base gasket will be required.
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