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A

B

1033576B-3/15

Close the lower 

plate, then press 

the silver hook.

CLOSE THE RED COVER.

it should close with firm 

resistance.

If not, repeat the previous 

step, being sure to press 

the silver hook.

ATTACH THE 

HEX KEY AND 

TIGHTEN 

COMPLETELY.

ChOOSe yOuR MOuNTING OPTION  

(Read A & B below). 

TO REARRANGE THE VIPER AFTER INSTALLATION:

• Lift the red cover, loosen the hex key.

• Reposition.

• Close the red cover, tighten the hex key.

conVenIent 

RepoSItIonIng:

Viper can slide along the bar for 

easy repositioning, even when 

locked and loaded.

The red cover cannot be opened 

unless the skewer is unlocked and 

removed from the Viper’s head.

SEPARATE THE 

SKEWER’S SHAFT 

FROM ITS HANDLE.

FIxeD poSItIon:

Viper can be in a fixed location for 

optimum security when mounted 

outside the towers.

Hold the switch DOWN and 

insert the skewer.

Hold the switch UP and 

insert the skewer.

do not install the Viper outside 

the tower if the switch is in the 

down position.

The switch is behind 

the Viper's head.

always install the Viper 

outside the tower with the 

switch in the uP position.

DOWN 

The switch is behind 

the Viper's head.

UP

Open lever. Hold the 

adjustment knob. Turn 

handle clockwise to 

remove the shaft.

place the Viper onto the bars.

Install the skewer from either side (consider access to the quick-release lever).

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