Cobra 2008 ECX70, Руководство по обслуживанию

Страница: 44 / 53

Procedure for Compression Testing
1. Shut off the fuel petcock.
2. Install the compression gauge into the spark plug hole.
3. Hold the throttle to wide open, and kick repeatedly (approximately 20
times) or until the gauge reading does not increase in value with each
kick.
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.
Code Supplied Base
Gasket Thickness
Cobra #
# mm inch With silicone bead Without silicone bead
2 0.2 0.008 ZCMU0702
0.25 0.010 ZCMU0011
3 0.3 0.012 ZCMU0703
4 0.4 0.015 ZCKG0501 (new) ZCKG0501 (old)
5 0.5 0.020 ZCMU0705
6 0.6 0.024 ZCMU0706
7 0.7 0.028 ZCMU0707
8 0.8 0.031 ZCMU0708 ZCMU0012
9 0.9 0.035 ZCMU0709 ZCMU0015
1 1.0 0.039 ZCMU0710 ZCMU0016
NOTE
Tolerances will affect the actual gasket thickness’.
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.
41