Purging Brake Lines; Drive Chain; Chain Slack Adjustment - E-TON Viper 70 Owner's Manual

Purging Brake Lines

For the hydraulic brake system to operate safely,
the brake system must be purged of air in the
lines and reservoir.
To bleed the air will require two people to perform
the following procedure.
1. Place a drain pan under the brake caliper
to catch the fluid.
2. Open the bleeder valve ½ turn counter
clockwise.
3. Squeeze the brake lever to expel air from
the system.
4. While holding the brake lever, close the
bleeder valve.
5. Repeat steps 2 through 4 until the brake
fluid coming from the bleeder valve is a
solid stream without any air, then close
the valve and replace rubber protection
cap.
6. Test the brake system by squeezing the
lever, the lever should feel firm and stop
without fading.

Drive Chain

The drive chain will stretch with use and will
require periodic adjustments. To check the chain
tension, remove the chain guard and measure the
slack.
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The amount of slack in the chain should not exceed
10-20mm or ¼" - ½".
Inspect the drive and axle sprockets for worn,
damaged or broken teeth. Replace as needed.
Inspect the chain links for damaged, worn or loose
rivets. Repair or replace as needed.

Chain Slack Adjustment

Loosen the axle position lock bolt slightly and
turn the chain adjuster nut to take up the excess
slack in the chain. Once the chain has been
adjusted to the proper tension retighten the axle
position locking bolt.
The chain should be kept well lubricated to prevent
excess wear and premature failure. We recommend
that you lubricate the chain every 15 hours of
operation, or more frequently if needed, with a high
quality chain lubricant.
the rubber cap.
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