Pro-Form 425 Zlx Bike User Manual page 19

HOW TO ADJUST THE DRIVE BELT
If you can feel the pedals slip while you are pedaling,
even when the resistance is adjusted to the highest
level, the drive belt may need to be adjusted.
To adjust the drive belt, you must remove the right
pedal, the shield cover, and the right frame shield (see
the instructions below).
Using an adjustable wrench, turn the right pedal coun-
terclockwise and remove it.
See HOW TO ADJUST THE REED SWITCH on page
18 and remove the Shield Cover (12).
Next, see the EXPLODED DRAWING near the end of
this manual and remove the M4 x 16mm Screws (61)
from the Right and Left Frame Shields (38, 39). Then,
gently remove the Right Frame Shield.
Hold the two M8 Locknuts (67) and loosen the two M8
x 20mm Bolts (72). Next, loosen the M10 x 45mm Hex
Screw (74) until the Drive Belt (77) is tight. Then, hold
the M8 Locknuts and tighten the M8 x 20mm Bolts.
77
67
72
74
Then, reattach the right frame shield, the top shield,
and the right pedal.
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