Lesson 3/Learning Event 1
Repair or replace any damaged or defective part.
To adjust the contact points, refer to figure 20 and perform the following steps.
Step 1. Rotate the engine flywheel until the cam follower is positioned on the highest point of
the ignition cam.
Step 2. Measure the point gap with a feeler gage. The proper gap is 0.018 inch. If the gap
measures more or less than 0.018, adjustment is necessary.
Step 3. Loosen the screw that secures the stationary plate and move the stationary plate until
the desired 0.018-inch gap is reached.
Tighten the screws, remeasure the gap, and readjust if necessary.
Breather Line Assembly
function of this line is to move oil vapors from the crankcase, through the valve train area, into
the air inlet side of the carburetor. This not only lubricates the valve train, but also allows the
burning of crankcase vapors.
Removal of the breather line assembly is accomplished by performing the following:
Remove the side cylinder covers (figure 21 on page 52).
Loosen the upper connector nut.
Loosen the lower connector nut.
Remove the breather line assembly.
The breather line assembly and side cylinder covers are replaced in the reverse order of
Cleaning and inspection of the breather line assembly is accomplished as follows:
Dry-cleaning solvent PD-680, which is used to clean parts, is potentially
dangerous to personnel and property. Avoid repeated and prolonged skin
contact. Do not use near open flame or excessive heat. The flash point of the
solvent is 100€ F. -138€ F./38€ C. -60€ C.
Clean the breather line assembly with dry-cleaning solvent PD-680. Dry thoroughly with
filtered compressed air.
Inspect the line and connector fittings for damage or breaks. Replace the breather line, if
defective or badly damaged.