Schwinn 411 Service Manual page 16

6. Using a #2 Phillips screwdriver, remove the indicated screws (by ovals)
from the Left Upper Engine Shroud.
Note: The Power Inlet is attached to the inside of the Left Upper Engine
Shroud. Do not crimp the Power Inlet Cable.
7. Remove the Left Upper Engine Shroud.
8. Using a #2 Phillips screwdriver, remove the 4 screws that attach each
of the Lower Engine Shrouds, and remove them.
9. To test the Drive Belt tension:
• Push the Drive Belt inward at the midpoint between the pulleys and
measure the distance. The Drive Belt should have only 0.25" (0.64
cm) of give.
Or:
• Hold the edges of the Drive Belt at the midpoint and twist it. The
Drive Belt should turn only 90 degrees (1/4 turn, to vertical).
If the tension is correct, go to Step 14.
If the tension is too loose or too tight, adjust the nut and bolt on the
Tensioner Bracket (Idler Assembly).
Left Upper Engine
Shroud
Power Inlet
Lower Engine Shroud,
Drive Pulley
16
Left
Midpoint of
Drive Belt
Drive Belt