Make sure the rotors are true. Spin the wheel and sight against the brake pads, watching for wobbles in the rotor. If the rotor clears the pads and caliper, the rotor is true
enough even if there are slight wobbles. If you spot a warp in the rotor, straighten it by clamping a clean adjustable wrench along the rotor and bending gently toward true.
Make sure everything that touches the rotor is perfectly clean. Any grease/oil/other contamination will reduce braking grip and may cause brake squealing.
If your brakes squeal, and no obvious contamination is present on the brake pads, something may be loose. Check all bolts holding the rotor on, as well as the caliper bolts
and adapter bolts (if your bike is fitted with one).
If everything’s snug, the rotor and pads should be cleaned with isopropyl alcohol or similar to remove contamination. If brake squealing continues, take your bike to your
dealer for professional service.
Regularly check the performance of the brakes and contact your dealer for a brake service if you notice a performance reduction.
4.5 Adjusting the Derailleur:
Adjust the lower adjustment screw to make the guide wheel move to the smallest sprocket on the free-wheel; Align the
center of the guide pulley and the outer line of the smallest sprocket, then tighten the gear shift cable with the nut on the
derailleur:
Turning the front chain-wheel, operate the gear lever to shift to the largest sprocket.
Turn the upper adjustment screw so that the guide pulley moves to a position directly below the largest sprocket.
By turning the screw inwards you shorten the travel of the derailleur, moving the guide pulley towards the centre of the free
wheel. By turning the screws outwards you increase the travel of the derailleur towards the frame or the spokes. When the
stop screws are adjusted correctly the chain will not come off the smallest cog into the frame or off the largest cog and into
the spokes.
Once the stop screws are correctly adjusted the cable tension can be adjusted by turning the barrel nut on the derailleur
cable entry point until the gears operate smoothly when selected with the gear lever.
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