Contact Breaker Points; Location; Inspection - Honda CB350 Repair Manual

28 TUNE—UP
slip fit (a slight drag) in a correctly ad—
justed valve.
7. If adjustment is necessary, loosen
the adjuster locknut and turn the ad—
juster to effect adjustment. Tighten the
locknut.
NOTE: The adjustment may change
when the locknut is tightened. Hold
the adjuster steady while securing the
locknut. Reckeck the clearance af—
terwards.
8. Turn the rotor 180° counter—
clockwise and line up the "T"" mark on
the rotor with the timing index mark on
the stator. In this position both valves for
the right cylinder should be closed. Ad—
just the valve clearance as described for
the left cylinder above.
CAUTION: Setting the valve clear—
ance too tight is to be avoided. Too
loose is preferable to too tight.
Contact Breaker Points
LOCATION
1. The points are located in a case on
the left—side ofthe cylinder head, and are
operated off the camshaft. The timing ad—
vance mechanism is fitted behind the
breaker point base plate.
INSPECTION
1. Remove the point cover, and make
a visual inspection of the points.
2. Slight graying of the breaker point
surfaces is normal.
3. The breaker point surfaces should
be inspected for pitting or a burned—look—
ing condition.
4. If pitting is present, the point sur—
faces may be restored by running a thin,
flat file through the points. Then clean
them thoroughly by wiping them with a
solvent. Remove any traces of solvent or
solid particles by running a piece of busi—
ness card or other piece of white paper
through the points, until they no longer
leave a mark on the paper.
NOTE: A too vigorous use of the file
will render the points unusable. Be
certain that the points are well cleaned
after filing. Never use sandpaper in
place of a file.
5. It is also possible to restore points
to a serviceable condition by removing
them from the machine and working the
contact surfaces on an oilstone. However
care must be taken not to remove too
much metal.
6. If pitting or burning is severe, the
points should be replaced. Refer to the
"Replacement" section. The condenser
should also be inspected; refer to
Chapter 7, "Electrical System."
condition: (1) points properly
point
aligned and in good condition; (2) worn or burnt
contact surfaces; (3) misalignment; (4) dirty contact
surfaces
Breaker
7. When closed the points should lie
flat against one another as shown in the
illustration. If they do not, adjust or re—
place them so that they do.
8. If an ohmmeter is available, check
the resistance across the points when
closed. Resistance should not exceed 0.1
ohm, or the points will have to be re—
placed.
9. Disconnect the primary wire at the
coil and check that the moving point is
electrically insulated from the engine
when the points are open (no continuity,
infinite resistance). Inspect the insulat—
ing washer at the wire terminal. Check
the point (primary) wire insulation. En—
sure that the wires are not contacting the
engine or frame at any place where it
might cause a short. Also ensure that the
wire terminal will not touch the point
cover when it is installed. Be sure that
the wires are properly routed through the
rubber grommet at the points case and
that the grommet is properly in place.
10. Check the fiber breaker point heel
and replace the points if the heel is ex—
cessively worn.
11. After the points are cleaned, check
the gap.