NOTE
: The mixture valve opening for engine CJ-750D can be checked and
adjusted as follows:
a.
Open the valve chamber cover ( Fig.7) remove rubber block (Fig.10) from
observation hole in crankcase, apply kickstarter to operate the crank shaft.
When inlet valve of left cylinder opens, apply gently kickstarter to make the
"O" scale line on flywheel be in the center of observation hole.
b
.Loosen the locknut, adjust the adjusting screw to make the gap between
end of adjusting screw and inlet (outlet) valve be 0.07mm for hot cylinder
and 0.1mm for cold cylinder. Then tighten the locknut and recheck the valve
opening with feeler gauge.
c
. Apply gently kickstarter to rotate the flywheel for 360 when the O scale
line of flywheel appears again in the center of observation hole, check and
adjust the right cylinder mixture valve opening with the above method.
4.3 Distributor Platinum Contact Gap Checking and Adjusting
T
he distributor should be kept clean. The platinum contact should be free from dust
and lube (oil) contaminaton. The contacting area of the contact should not be less than
80% and the centers of upper and lower contacts should align with each other.
4.3.1
The distributor of engine CJ-750, installed in the front end cover of crankcase,
is of FDQ-1 type, whose contact gap is adjusted as follows (see Fig.8).
4.3.1.1
Remove crankcase front cover and distributor cover.
4.3.1.2
Rotate camshaft to a certain position by applying kickstarter and take off
distributor disk.
4.3.1.3
Rise camshaft by applying kickstarter to separate platinum contacts.
