HEAD SET AND
ROTOR ASSEMBLY DIAGRAM
| D D | A |
| B1 | |
B1B2 E | B A | |
B2 | F | B |
| E | C |
| F | |
|
| |
| G |
|
|
| C |
| H |
|
| G |
|
| H |
|
BRAKE |
| UPPER CABLE |
LEVER |
|
|
|
| BRAKE |
|
| CALIPER |
ROTOR | LOWER | |
CABLE | ||
COMPLETE ASSEMBLY
PARALLEL
ROTOR CABLE ASSEMBLY
7 6
5
3A
3
2
4
3
2
1
40
Rotor Headset
A rotor is a special headset mechanism used on some BMX Freestyle bikes. It enables the handlebars to be turned 360 degrees without tangling the brake cables. In this system the front brake cable is connected to the right control lever via the hollow headstem and the fork. The rear brake cable is split at the rotor bearing mechanism, activating the rear brake by transferring the left control lever pressure.
Rotor Installation and Adjustment
Installing and adjusting a rotor headset can be quite a complex task and one you may refer to your professional bicycle mechanic. However, if you feel capable the process for rotor installation and adjustment is listed below.
-Remove fork (H) and upper headset cup (F) from your bicycle.
-Place lower cable stop (C) on the top of the head tube (G). Replace and fasten the upper headset cup to the head tube via the lower cable stop.
-Install headset unit onto the fork neck, except the lock washer and lock nut.
-Place rotor bearing unit (B) over the head set ensuring the larger side is facing up.
-Install upper cable lock (A) onto the fork neck. (The original lock washer is now redundant.)
-Place lock nut (D) onto fork neck and alter the head set as usual.
-Connect the upper cable to the left brake lever. (Discard cable ferrule provided on the upper cable if your lever is already equipped with a cable adjuster.) Hook the two cable ends (1) to the top hooks (B1) of the rotor bearing unit. Screw the adjusting barrels into the upper cable stop.
-Pull rotor bearing unit downward to pick up the slack of cables. Adjust the height of bearing unit though the cable adjuster on the brake lever or cable splitter until the bottom hooks (B2) of the rotor bearing unit are approximately 1/8” – 1/4” away from the lower cable stop.
-Run the lower cable under the frame tube with the split cables on each side of the frame. Hook the two cable ends (1) to the bottom hooks (B2) of the bearing unit. Screw the adjusting barrels into the lower cable stop.
-Measure and cut the single measure housing (3A) to the correct length (Caution: This is the only cable that can be cut to adjust for different frame lengths.) Connect the cable to the rear brake calliper in the usual manner.
RAOM0507 | Apollo Bicycle Company Pty. Ltd. ABN: 60 001 914 469 | Updated 23/05/07 |