Helio Electric Cycle Owner's Manual page 33

5. Tighten the wheel axle nuts after adjusting and before test riding.
If you are in doubt about the proper tension, make small tension adjustments and test
ride your Helio between adjustments until the belt stops skipping (generally occurs
first during hard automatic braking from high speed.)
When the belt is properly tensioned, check to make sure the wheel is properly
aligned by rotating the rear wheel by hand. If the belt rides in the center of the drive
pulley, it is correctly aligned. If the belt rides close to the right (outside) edge of the
pulley add another ½ turn to the right side adjuster nut and loosen the left side
adjuster nut ½ turn. Repeat until the belt rides near the center of the pulley.
Be careful not to over tighten the belt using this alignment method. When
the belt is too tight it will be noisy, create vibrations, and lead to premature belt
and pulley wear. If the belt appears aligned but is too tight, turn both adjuster
nuts evenly in the counterclockwise direction, then retighten the rear wheel
retaining bolts.
It is very important that the rear wheel is properly aligned. A misaligned
wheel can cause the belt to come off the drive-pulley, which can damage the
belt, the drive pulley, and the rear wheel. A misaligned wheel will also cause
the belt and drive pulley to wear unevenly, which can result in belt or drive
pulley failure.
If adjustments to the secondary drive belt (previous page) do not eliminate the
skipping tendency, tension the primary belt.
Primary Belt Tension Adjustment
1. Remove the battery door using a
3mm allen wrench.
2. Using an adjustable wrench, slightly
loosen the motor mounting bolt
3. Using a small adjustable wrench,
tighten (clockwise) the primary belt
tension adjuster nut (remove the
small black rubber cap) by ½ turn.
4. Tighten the top motor mounting bolt
and replace the battery door.
Make small tension adjustments and test
ride between adjustments until the belt stops skipping.
Note: If your Helio Cycle does not have a tension adjuster system on the motor
mount, then the motor mount must be removed from the chassis to adjust the tension
of the primary belt. Please contact eGO Vehicles for complete service instructions.
Tension Adjuster
Nut
Page 33
Mounting Bolt