78
Rotors
Some freestyle BMX bicycles come equipped with a cable detangler
system that will allow the handlebar to spin 360-degrees without
binding the cables. It is very important that this system is adjusted
correctly. Installation should only be done by a qualified bicycle
mechanic with the correct tools.
Upper Cable
First connect the barrel end of the upper cable to the rear
1.
brake lever. Make sure the long cable casing is on top of the
short cable casing; otherwise, the upper cable will have a twist
in it.
Route the upper cable through the handlebars (below the
2.
crossbar) with the short cable casing on the same side as the
rear brake lever.
Connect the upper cable to the upper plate by passing the
3.
football ends of the upper cable through the threaded holes in
the upper plate and connecting them to the bearing.
Screw the adjusting barrels into the upper plate. Don’t
4.
tighten the locknuts at this time.
Lower Cable
Slide the cable casing through the cable guide on the frame.
1.
Connect the lower cable to the lower plate by passing the
2.
football ends of the lower cable through the threaded holes in
the lower plate and connecting them to the bearing.
Screw the adjusting barrels into the lower plate. Don’t tighten
3.
the locknuts at this time.
Connect the lower cable to the rear brake. Don’t adjust the
4.
rear brake at this time.
NOTE:
Check to make sure all 11 cable casing ends on the
upper and lower cables are seated correctly, and that the spring
tension of the rear brake is pulling the bearing down.
Adjustment
Screw the cable adjusters on the rear brake lever and the
1.
upper cable splitter all the way in.
Screw the adjusting barrels in the upper plate in (or out)
2.
to set the
bearing for maximum travel. The bearing should be as far down
as it can go without resting on the lower plate or the adjusting
barrels screwed into the lower plate.
Use the adjusting barrels that are screwed into the upper plate
3.
to make the bearing parallel to the upper plate. Use a 10mm
wrench to tighten the locknut on the left adjusting barrel of the
upper cable. Leave the right adjusting barrel loose.
Screw the lower cable adjusting barrel into (or out of) the
4.
lower plate until they are as close to the bearing as they can
get without touching it.
Screw the cable adjuster on the upper cable splitter out
5.
until all slack is removed from the upper cable. Then screw
the cable adjuster out one more turn to raise the bearing an
additional 1mm away from the lower cable adjusting barrels.
CAUTION:
Don’t screw the cable adjuster on the upper cable
splitter out more than 8mm. Use the cable adjuster on the rear
brake lever if more adjustment is needed.
Check for bearing flop by placing the handlebars in the normal
6.
riding position, then quickly rotate the handlebars back and
forth. Perform the following steps to eliminate bearing flop.
NOTE:
The bearing should never be allowed to rest on the
lower plate or lower cable adjusting barrels.
Screw the lower cable adjusting barrels out of (or into)
a)
the lower plate until all bearing flop is eliminated.
Tighten the locknut of the right adjusting barrel on the
b)
lower cable.
Rotate the handlebars 180 degrees and recheck for
c)
bearing flop. If there is any bearing flop, use the “loose”
adjusting barrels on the upper and lower cable to remove it.
Repeat steps (6a) and (6c) until the handlebars can be
d)
rotated 360 degrees without any bearing flop.
7. Finish adjusting the rear brakes.
