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K. Attaching non-mounted components that come with the bike.
All our bikes are assembled in accordance with national legislation.
Non-mounted components that come with the bike need to be
attached by a qualied and experienced mechanic.
For BMX bikes, you need to contact a qualied mechanic
to ensure that the pegs are correctly installed.
L. Lubrication
It's important to lubricate bike components to keep your bike running well, to maximize its lifespan and avoid component
corrosion.
Use a special transmission oil for drive train parts. You're advised to use a special oil for the chain. After washing: dry, oil drive train
components (derailleur, lever), suspension, brake levers, brake caliper axles as well as the chain. To ensure proper sealing, oil the
seat post and headset thoroughly.
Warning: Lubrication of bike components - apart from the chain - should be carried out by a qualied and experienced mechanic
during regular servicing.
M. Adjusting chain tension
If the bike has a derailleur, the chain will automatically be stretched. If you have a single gear bike or a bike equipped with
integrated hub gears, it's important to check the chain tension periodically
(slack in the chain can cause the chain to derail, leading to a fall; a chain that is
too tight can adversely aect the bike's performance).
To ensure the chain runs smoothly, there must be a vertical travel of 1 cm,
measured at the half way point between the cog and the pedal.
Chain tension and adjustment for all other gear systems should be carried out
in accordance with component manufacturer's instructions which can be found
on www.btwin.com
N. Adjusting gears and gear use
To adjust gears, refer to the component manufacturer's instructions which can be found on www.btwin.com.
The gears must be adjusted as follows:
This is a tricky procedure so you are advised to contact one of our qualied
technicians.
Note: Problems with changing gear are often linked to the derailleur cable
tension;
you are less likely to have to adjust the derailleur movement.
1 - Adjusting rear derailleur movement
To prevent the chain slipping o the cogs (falling into the wheel spokes
or between the rear dropout and cogs), you need to adjust the derailleur
movement, using H and L stop screws:
Use screw H to adjust the lower stop (small cog side): undoing this screw
moves the chain outward towards the small cog.
Use screw L to adjust the upper stop (large cog side): undoing this screw
moves the chain outward towards the large cog.
2 - Adjusting front derailleur movement
1 cm
Derailleur
stop
Cable xing bolt
Stop screw H
Stop screw L
Cable xing
bolt washer
Cable xing bolt
Chain guide outer
plate
Chain guide inner
plate
Chain
Chain
ADJUSTING OUTER STOP
SCREW
ADJUSTING
INNER STOP
SCREW
Adjusting inner stop
By turning the outer screw of
the derailleur in direction A, the
derailleur will move towards the
smallest chain ring; by turning it in
direction B, it will move away from
the large chain ring. Then adjust
so that the clearance between the
chain guide inner plate and the
chain is between 0 and 0.5 mm.
Adjusting outer stop
By turning the inner screw of
the derailleur in direction A,
the derailleur will move away
from the smallest chain ring;
by turning it in direction B, it will
move towards the large chain ring.
Then adjust so that the clearance
between the chain guide outer plate
and the chain is between 0 and 0.5 mm.
3- Adjusting derailleur tension
Adjusting the cable tension creates a link between a position on the gear lever and a position in the gear system. Unscrew or
tighten the cable tension screw at the lever or at the rear of the derailleur so that each lever position corresponds to a cog:
=> If the chain does not move down every time you shift the lever:
• loosen the cable by turning the cable tension adjusting screw clockwise.
=> If the chain does not move up every time you shift the
lever:
• tighten the cable by turning the cable tension adjusting
screw anticlockwise.
The adjusting screw supplied can be used to:
- Fit or dismantle the gears
- Adjust the handlebars
- Adjust the seat
- Fit or dismantle the wheels.
8


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