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Rotors
Some freestyle BMX bicycles come equipped with a 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
1. First connect the barrel end of the upper cable to the
rear 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.
2. Route the upper cable through the handlebars (below
the crossbar) with the short cable casing on the same
side as the rear brake lever.
3. Connect the upper cable to the upper plate by passing
the football ends of the upper cable through the threaded
holes in the upper plate and connecting them to the bearing.
4. Screw the adjusting barrels into the upper plate. Don’t
tighten the locknuts at this time.
Lower Cable
1. Slide the cable casing through the cable guide on the frame.
2. Connect the lower cable to the lower plate by passing
the football ends of the lower cable through the threaded
holes in the lower plate and connecting them to the bearing.
3. Screw the adjusting barrels into the lower plate. Don’t
tighten the locknuts at this time.
4. Connect the lower cable to the rear brake. Don’t adjust
the 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
1. Screw the cable adjusters on the rear brake lever and the
upper cable splitter all the way in.
2. Screw the adjusting barrels in the upper plate in (or out)
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.
3. Use the adjusting barrels that are screwed into the
upper plate 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.
4. Screw the lower cable adjusting barrel into (or out of)
the lower plate until they are as close to the bearing as
they can get without touching it.
5. Screw the cable adjuster on the upper cable splitter out
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.
6. Check for bearing flop by placing the handlebars in the
normal 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.
a) Screw the lower cable adjusting barrels out of (or
into) the lower plate until all bearing flop is eliminated.
b) Tighten the locknut of the right adjusting barrel on the
lower cable.
c) Rotate the handlebars 180 degrees and recheck for
bearing flop. If there is any bearing flop, use the
“loose” adjusting barrels on the upper and lower cable to
remove it.
d) Repeat steps (6a) and (6c) until the handlebars can be
rotated 360 degrees without any bearing flop.
7. Finish adjusting the rear brakes.
